SQL Server 2022

By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
-- Pagination from two tables in SQL Server
-- https://stackoverflow.com/questions/77565466/

-- Changed to compound PK with separate index for UserId
CREATE TABLE TableA (
  "ColumnA" VARCHAR(1),
  "UserId" INTEGER,
  CONSTRAINT PK_TableA PRIMARY KEY ("ColumnA", "UserId"),
  INDEX IX_TableA_UserId ("UserId")
);

INSERT INTO TableA
  ("ColumnA", "UserId")
VALUES
  ('x', '1'),
  ('y', '2'),
  ('z', '3'),
  ('w', '4');

-- Changed to compound PK with separate index for UserId
CREATE TABLE TableB (
  "ColumnB" VARCHAR(1),
  "UserId" INTEGER,
  CONSTRAINT PK_TableB PRIMARY KEY ("ColumnB", "UserId"),
  INDEX IX_TableB_UserId ("UserId")
);

INSERT INTO TableB
  ("ColumnB", "UserId")
VALUES
  ('a', '1'),
  ('b', '3'),
  ('c', '5'),
  ('d', '6');

-- Lots more data
INSERT TableA SELECT S.value, S.value FROM GENERATE_SERIES(10, 10000, 2) S
INSERT TableB SELECT S.value, S.value FROM GENERATE_SERIES(10, 10000, 3) S
8335 rows affected

-- Procedure to retrieve paged UserIds using Keyset Pagination
-- Supports forward paging only
CREATE PROCEDURE GetPagedUserIds
    @PageSize INT,
    @PriorUserId INT = 0
AS
SELECT TOP (@PageSize) U.UserId
FROM (
    SELECT A.UserId
    FROM TableA A
    WHERE A.UserId > @PriorUserId
    UNION
    SELECT B.UserId
    FROM TableB B
    WHERE B.UserId > @PriorUserId
) U
ORDER BY U.UserId;
-- Demonstrate simple keyset page retrieval
set statistics xml on
EXEC GetPagedUserIds @PageSize = 3
EXEC GetPagedUserIds @PageSize = 3, @PriorUserId = 3
EXEC GetPagedUserIds @PageSize = 3, @PriorUserId = 300
set statistics xml off


UserId


1

2

3




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT TOP (@PageSize) U.UserId&#xa;FROM (&#xa;    SELECT A.UserId&#xa;    FROM TableA A&#xa;    WHERE A.UserId &gt; @PriorUserId&#xa;    UNION&#xa;    SELECT B.UserId&#xa;    FROM TableB B&#xa;    WHERE B.UserId &gt; @PriorUserId&#xa;) U&#xa;ORDER BY U.UserId" StatementId="1" StatementCompId="7" StatementType="SELECT" StatementSqlHandle="0x09007D7812E5B30E07309FE3ECA79C3EFB390000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="965578478" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0128539" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x8D4E183CF37EAC3B" QueryPlanHash="0x7D8DCD1C1E278338" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="40" CompileTime="31" CompileCPU="15" CompileMemory="280"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0128539" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1003"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="1" PhysicalOp="Merge Join" LogicalOp="Union" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.0237702" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0128536" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimateIO="0" EstimateCPU="0.005" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032968" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="4" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="4" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PriorUserId]"><Identifier><ColumnReference Column="@PriorUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></StreamAggregate></RelOp><RelOp NodeId="4" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimateIO="0" EstimateCPU="0.003335" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></GroupBy><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PriorUserId]"><Identifier><ColumnReference Column="@PriorUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></StreamAggregate></RelOp></Merge></RelOp></Top></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@PriorUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(0)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId


4

5

6




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT TOP (@PageSize) U.UserId&#xa;FROM (&#xa;    SELECT A.UserId&#xa;    FROM TableA A&#xa;    WHERE A.UserId &gt; @PriorUserId&#xa;    UNION&#xa;    SELECT B.UserId&#xa;    FROM TableB B&#xa;    WHERE B.UserId &gt; @PriorUserId&#xa;) U&#xa;ORDER BY U.UserId" StatementId="2" StatementCompId="7" StatementType="SELECT" StatementSqlHandle="0x09007D7812E5B30E07309FE3ECA79C3EFB390000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="965578478" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0128539" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x8D4E183CF37EAC3B" QueryPlanHash="0x7D8DCD1C1E278338" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="40" CompileTime="31" CompileCPU="15" CompileMemory="280"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0128539" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1003"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="1" PhysicalOp="Merge Join" LogicalOp="Union" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.0237702" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0128536" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimateIO="0" EstimateCPU="0.005" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032968" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PriorUserId]"><Identifier><ColumnReference Column="@PriorUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></StreamAggregate></RelOp><RelOp NodeId="4" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimateIO="0" EstimateCPU="0.003335" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></GroupBy><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PriorUserId]"><Identifier><ColumnReference Column="@PriorUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></StreamAggregate></RelOp></Merge></RelOp></Top></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@PriorUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(3)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId


301

302

304




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT TOP (@PageSize) U.UserId&#xa;FROM (&#xa;    SELECT A.UserId&#xa;    FROM TableA A&#xa;    WHERE A.UserId &gt; @PriorUserId&#xa;    UNION&#xa;    SELECT B.UserId&#xa;    FROM TableB B&#xa;    WHERE B.UserId &gt; @PriorUserId&#xa;) U&#xa;ORDER BY U.UserId" StatementId="3" StatementCompId="7" StatementType="SELECT" StatementSqlHandle="0x09007D7812E5B30E07309FE3ECA79C3EFB390000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="965578478" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0128539" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x8D4E183CF37EAC3B" QueryPlanHash="0x7D8DCD1C1E278338" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="40" CompileTime="31" CompileCPU="15" CompileMemory="280"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0128539" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1003"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="1" PhysicalOp="Merge Join" LogicalOp="Union" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.0237702" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0128536" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimateIO="0" EstimateCPU="0.005" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032968" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PriorUserId]"><Identifier><ColumnReference Column="@PriorUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></StreamAggregate></RelOp><RelOp NodeId="4" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimateIO="0" EstimateCPU="0.003335" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></GroupBy><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PriorUserId]"><Identifier><ColumnReference Column="@PriorUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></StreamAggregate></RelOp></Merge></RelOp></Top></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@PriorUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(300)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>


-- Procedure to retrieve paged UserIds using modified Keyset Pagination
-- Optimally supports first, next, prior, and same page retrieval.
-- Arbitrary page navigation minimizes discarded row retrieval.
-- Efficient execution depends on key being the first indexed column of some index.
CREATE PROCEDURE GetPagedUserIdsExtended
    @PageSize INT,
    @PageNumber INT,
    @PreviousPageNumber INT = NULL,
    @PreviousMinUserId INT = NULL,
    @PreviousMaxUserId INT = NULL
AS

DECLARE @Offset INT
  
IF (@PageNumber IS NULL
    OR @PageNumber <= 0
    OR @PageSize IS NULL
    OR @PageSize <= 0
)
BEGIN
    -- Invalid - Return empty result
    SELECT 0 AS UserId
        , @PageNumber AS PageNumber
        , 'Invalid' AS Algorithm
END
  
ELSE IF (@PageNumber = 1
         OR @PreviousPageNumber IS NULL
         OR @PreviousPageNumber <= 0
         OR (@PreviousMinUserId IS NULL AND @PageNumber < @PreviousPageNumber)
         OR (@PreviousMaxUserId IS NULL AND @PageNumber >= @PreviousPageNumber)
         OR @PageNumber < @PreviousPageNumber / 2 -- Quicker to seek from start
)
BEGIN
    -- Seek relative to start
    SET @Offset = @PageSize * (@PageNumber - 1)

    SELECT U.UserId
        , @PageNumber AS PageNumber
        , CONCAT('Seek from start, offset ', @Offset) AS Algorithm
    FROM (
        SELECT A.UserId
        FROM TableA A
        UNION ALL
        SELECT B.UserId
        FROM TableB B
    ) U
    GROUP BY U.UserId
    ORDER BY U.UserId
    OFFSET @Offset ROWS
    FETCH NEXT @PageSize ROWS ONLY
END

ELSE IF (@PageNumber = @PreviousPageNumber)
BEGIN
    -- Same page seek forward
    SET @Offset = 0

    SELECT U.UserId
        , @PageNumber AS PageNumber
        , CONCAT('Seek same page, offset ', @Offset) AS Algorithm
    FROM (
        SELECT A.UserId
        FROM TableA A
        WHERE A.UserId >= @PreviousMinUserId
        UNION ALL
        SELECT B.UserId
        FROM TableB B
        WHERE B.UserId >= @PreviousMinUserId
    ) U
    GROUP BY U.UserId
    ORDER BY U.UserId
    OFFSET @Offset ROWS
    FETCH NEXT @PageSize ROWS ONLY
END

ELSE IF (@PageNumber > @PreviousPageNumber)
BEGIN
    -- Seek forward 1 or more pages
    SET @Offset = @PageSize * (@PageNumber - @PreviousPageNumber - 1)

    SELECT U.UserId
        , @PageNumber AS PageNumber
        , CONCAT('Seek forward, offset ', @Offset) AS Algorithm
    FROM (
        SELECT A.UserId
        FROM TableA A
        WHERE A.UserId > @PreviousMaxUserId
        UNION ALL
        SELECT B.UserId
        FROM TableB B
        WHERE B.UserId > @PreviousMaxUserId
    ) U
    GROUP BY U.UserId
    ORDER BY U.UserId
    OFFSET @Offset ROWS
    FETCH NEXT @PageSize ROWS ONLY
END

ELSE IF (@PageNumber < @PreviousPageNumber)
BEGIN
    -- Seek backwards 1 or more pages
    SET @Offset = @PageSize * (@PreviousPageNumber - @PageNumber - 1)

    SELECT U.UserId
        , @PageNumber AS PageNumber
        , CONCAT('Seek backwards, offset ', @Offset) AS Algorithm
    FROM (
        SELECT U.UserId
        FROM (
            SELECT A.UserId
            FROM TableA A
            WHERE A.UserId < @PreviousMinUserId
            UNION ALL
            SELECT B.UserId
            FROM TableB B
            WHERE B.UserId < @PreviousMinUserId
        ) U
        GROUP BY U.UserId
        ORDER BY U.UserId DESC
        OFFSET @Offset ROWS
        FETCH NEXT @PageSize ROWS ONLY
    ) U
    ORDER BY U.UserId -- Reorder ascending
END

-- End of procedure
-- Test stored procedure GetPagedUserIdsExtended
-- using a variety of page requests that exersise the
-- first, next, prior, same, and arbitrary forward and backwards
-- page navigation capabilities

set statistics xml off

DECLARE @TestScenarios TABLE (
    SenarioId INT IDENTITY(1,1),
    PageNumber INT,
    Comment VARCHAR(100)
)
INSERT @TestScenarios
VALUES
    (100, 'Initial request, relative to origin (costly, but necessary)'),
    (101, 'Next page'),
    (104, 'Skip ahead several pages'),
    (105, 'Next page'),
    (105, 'Same page'),
    (104, 'Prior page'),
    (100, 'Skip back several pages'),
    (3, 'Skip way back, retrieved relative to origin'),
    (1, 'First page, relative to origin'),
    (2, 'Next page'),
    (2222, 'Skip ahead, near the end (costly scan)'),
    (2223, 'Next (last) page'),
    (2224, 'Next page, beyond the end (zero results)'),
    (2223, 'Prior (last) page (requires a costly scan from start)')

DECLARE @Results TABLE (
    UserId INT,
    PageNumber INT,
    Algorithm VARCHAR(100)
)
  
DECLARE @PageSize INT = 3

DECLARE @PageNumber INT
DECLARE @Comment VARCHAR(100)

DECLARE @PreviousPageNumber INT = 0
DECLARE @PreviousMinUserId INT = 0
DECLARE @PreviousMaxUserId INT = 0

DECLARE @MaxSenarioId INT = (SELECT MAX(SenarioId) FROM @TestScenarios)
DECLARE @SenarioId INT = 1
WHILE @SenarioId <= @MaxSenarioId
BEGIN
    SELECT @PageNumber = PageNumber, @Comment = Comment
    FROM @TestScenarios
    WHERE SenarioId = @SenarioId

    set statistics xml on
    INSERT @Results
    EXEC GetPagedUserIdsExtended  --  <<<<<<<<<< Here it is
        @PageSize,
        @PageNumber,
        @PreviousPageNumber,
        @PreviousMinUserId,
        @PreviousMaxUserId
    set statistics xml off

    SELECT *, @Comment
    FROM @Results

    SET @PreviousPageNumber = (SELECT TOP 1 PageNumber FROM @Results)
    SET @PreviousMinUserId = (SELECT MIN(UserId) FROM @Results)
    SET @PreviousMaxUserId = (SELECT MAX(UserId) FROM @Results)

    DELETE FROM @Results
  
    SET @SenarioId += 1
END


Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek from start, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="1" StatementCompId="31" StatementType="SELECT" StatementSqlHandle="0x090019F46B3D5C4B13E60A60C67A02AF4D860000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0xDBEA087636977705" QueryPlanHash="0x5843A168DB7EC108" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="480"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="33" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek from start, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek from start, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="300" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="377" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="226" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="226" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="152" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="152" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(297)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(100)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="2" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


446
100
Seek from start, offset 297
Initial request, relative to origin (costly, but necessary)

448
100
Seek from start, offset 297
Initial request, relative to origin (costly, but necessary)

450
100
Seek from start, offset 297
Initial request, relative to origin (costly, but necessary)




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek forward, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt; @PreviousMaxUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt; @PreviousMaxUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="3" StatementCompId="41" StatementType="SELECT" StatementSqlHandle="0x0900FB55315C719AF5A33D6C58E5D58C20B30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x78D1E731A3A08255" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="31" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek forward, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek forward, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="5" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(101)"></ColumnReference><ColumnReference Column="@PreviousMaxUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(450)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="4" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


451
101
Seek forward, offset 0
Next page

452
101
Seek forward, offset 0
Next page

454
101
Seek forward, offset 0
Next page




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek forward, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt; @PreviousMaxUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt; @PreviousMaxUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="5" StatementCompId="41" StatementType="SELECT" StatementSqlHandle="0x0900FB55315C719AF5A33D6C58E5D58C20B30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x78D1E731A3A08255" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="31" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek forward, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek forward, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="9" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="12" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="8" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="8" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="5" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="5" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(6)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(104)"></ColumnReference><ColumnReference Column="@PreviousMaxUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(454)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="6" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><WaitStats><Wait WaitType="MEMORY_ALLOCATION_EXT" WaitTimeMs="15" WaitCount="4"></Wait></WaitStats><QueryTimeStats ElapsedTime="15" CpuTime="15"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


464
104
Seek forward, offset 6
Skip ahead several pages

466
104
Seek forward, offset 6
Skip ahead several pages

468
104
Seek forward, offset 6
Skip ahead several pages




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek forward, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt; @PreviousMaxUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt; @PreviousMaxUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="7" StatementCompId="41" StatementType="SELECT" StatementSqlHandle="0x0900FB55315C719AF5A33D6C58E5D58C20B30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x78D1E731A3A08255" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="31" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek forward, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek forward, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="5" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(105)"></ColumnReference><ColumnReference Column="@PreviousMaxUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(468)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="8" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


469
105
Seek forward, offset 0
Next page

470
105
Seek forward, offset 0
Next page

472
105
Seek forward, offset 0
Next page




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek same page, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt;= @PreviousMinUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt;= @PreviousMinUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="9" StatementCompId="36" StatementType="SELECT" StatementSqlHandle="0x09001FE2E20F393058465BCC7528211D52A50000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x1BB67DF5DE6D2997" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="32" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek same page, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek same page, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="5" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GE"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMinUserId]"><Identifier><ColumnReference Column="@PreviousMinUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GE"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMinUserId]"><Identifier><ColumnReference Column="@PreviousMinUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(105)"></ColumnReference><ColumnReference Column="@PreviousMinUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(469)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="10" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


469
105
Seek same page, offset 0
Same page

470
105
Seek same page, offset 0
Same page

472
105
Seek same page, offset 0
Same page




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek backwards, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT U.UserId&#xa;        FROM (&#xa;            SELECT A.UserId&#xa;            FROM TableA A&#xa;            WHERE A.UserId &lt; @PreviousMinUserId&#xa;            UNION ALL&#xa;            SELECT B.UserId&#xa;            FROM TableB B&#xa;            WHERE B.UserId &lt; @PreviousMinUserId&#xa;        ) U&#xa;        GROUP BY U.UserId&#xa;        ORDER BY U.UserId DESC&#xa;        OFFSET @Offset ROWS&#xa;        FETCH NEXT @PageSize ROWS ONLY&#xa;    ) U&#xa;    ORDER BY U.UserId" StatementId="11" StatementCompId="46" StatementType="SELECT" StatementSqlHandle="0x09006F7E0CA7CD20FF9A0773E5D7BB82769D0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0235315" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x81D09C4D8E8A0A69" QueryPlanHash="0x06D330F59E2EE807" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" MemoryGrant="1024" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="40" CompileTime="0" CompileCPU="0" CompileMemory="528"><MemoryGrantInfo SerialRequiredMemory="512" SerialDesiredMemory="544" RequiredMemory="512" DesiredMemory="544" RequestedMemory="1024" GrantWaitTime="0" MaxQueryMemory="666288" GrantedMemory="1024" MaxUsedMemory="16"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1" EstimateIO="0" EstimateCPU="1e-07" AvgRowSize="32" EstimatedTotalSubtreeCost="0.0235315" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek backwards, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek backwards, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Sort" LogicalOp="Sort" EstimateRows="1" EstimateIO="0.0112613" EstimateCPU="0.000100011" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0235314" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><MemoryFractions Input="1" Output="1"></MemoryFractions><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRebinds="1" ActualRewinds="0" ActualEndOfScans="1" ActualExecutions="1" InputMemoryGrant="1024" OutputMemoryGrant="640" UsedMemoryGrant="16" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Sort Distinct="0"><OrderBy><OrderByColumn Ascending="1"><ColumnReference Column="Union1002"></ColumnReference></OrderByColumn></OrderBy><RelOp NodeId="2" PhysicalOp="Top" LogicalOp="Top" EstimateRows="1" EstimateIO="0" EstimateCPU="1e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0121701" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="3" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateIO="0" EstimateCPU="1.5e-06" AvgRowSize="11" EstimatedTotalSubtreeCost="0.01217" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="4" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="2" EstimateIO="0" EstimateCPU="0.0056023" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0121685" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="5" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="4" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="4" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="BACKWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><EndRange ScanType="LT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMinUserId]"><Identifier><ColumnReference Column="@PreviousMinUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></EndRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="6" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="2" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="BACKWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><EndRange ScanType="LT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMinUserId]"><Identifier><ColumnReference Column="@PreviousMinUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></EndRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></Sort></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(104)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@PreviousMinUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(469)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="12" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


464
104
Seek backwards, offset 0
Prior page

466
104
Seek backwards, offset 0
Prior page

468
104
Seek backwards, offset 0
Prior page




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek backwards, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT U.UserId&#xa;        FROM (&#xa;            SELECT A.UserId&#xa;            FROM TableA A&#xa;            WHERE A.UserId &lt; @PreviousMinUserId&#xa;            UNION ALL&#xa;            SELECT B.UserId&#xa;            FROM TableB B&#xa;            WHERE B.UserId &lt; @PreviousMinUserId&#xa;        ) U&#xa;        GROUP BY U.UserId&#xa;        ORDER BY U.UserId DESC&#xa;        OFFSET @Offset ROWS&#xa;        FETCH NEXT @PageSize ROWS ONLY&#xa;    ) U&#xa;    ORDER BY U.UserId" StatementId="13" StatementCompId="46" StatementType="SELECT" StatementSqlHandle="0x09006F7E0CA7CD20FF9A0773E5D7BB82769D0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0235315" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x81D09C4D8E8A0A69" QueryPlanHash="0x06D330F59E2EE807" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" MemoryGrant="1024" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="40" CompileTime="0" CompileCPU="0" CompileMemory="528"><MemoryGrantInfo SerialRequiredMemory="512" SerialDesiredMemory="544" RequiredMemory="512" DesiredMemory="544" RequestedMemory="1024" GrantWaitTime="0" MaxQueryMemory="666288" GrantedMemory="1024" MaxUsedMemory="16"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="1" EstimateIO="0" EstimateCPU="1e-07" AvgRowSize="32" EstimatedTotalSubtreeCost="0.0235315" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek backwards, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek backwards, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Sort" LogicalOp="Sort" EstimateRows="1" EstimateIO="0.0112613" EstimateCPU="0.000100011" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0235314" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><MemoryFractions Input="1" Output="1"></MemoryFractions><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRebinds="1" ActualRewinds="0" ActualEndOfScans="1" ActualExecutions="1" InputMemoryGrant="1024" OutputMemoryGrant="640" UsedMemoryGrant="16" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Sort Distinct="0"><OrderBy><OrderByColumn Ascending="1"><ColumnReference Column="Union1002"></ColumnReference></OrderByColumn></OrderBy><RelOp NodeId="2" PhysicalOp="Top" LogicalOp="Top" EstimateRows="1" EstimateIO="0" EstimateCPU="1e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0121701" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="3" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="1" EstimateIO="0" EstimateCPU="1.5e-06" AvgRowSize="11" EstimatedTotalSubtreeCost="0.01217" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="12" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="4" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="2" EstimateIO="0" EstimateCPU="0.0056023" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0121685" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="16" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="10" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="10" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="BACKWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><EndRange ScanType="LT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMinUserId]"><Identifier><ColumnReference Column="@PreviousMinUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></EndRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="6" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.003125" EstimateCPU="0.0001581" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="7" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="7" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="BACKWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><EndRange ScanType="LT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMinUserId]"><Identifier><ColumnReference Column="@PreviousMinUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></EndRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></Sort></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(100)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(9)"></ColumnReference><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@PreviousMinUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(464)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="14" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


446
100
Seek backwards, offset 9
Skip back several pages

448
100
Seek backwards, offset 9
Skip back several pages

450
100
Seek backwards, offset 9
Skip back several pages




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek from start, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="15" StatementCompId="31" StatementType="SELECT" StatementSqlHandle="0x090019F46B3D5C4B13E60A60C67A02AF4D860000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0xDBEA087636977705" QueryPlanHash="0x5843A168DB7EC108" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="480"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="33" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek from start, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek from start, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="9" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="13" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="7" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="7" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="7" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="7" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(6)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(3)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="16" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


10
3
Seek from start, offset 6
Skip way back, retrieved relative to origin

12
3
Seek from start, offset 6
Skip way back, retrieved relative to origin

13
3
Seek from start, offset 6
Skip way back, retrieved relative to origin




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek from start, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="17" StatementCompId="31" StatementType="SELECT" StatementSqlHandle="0x090019F46B3D5C4B13E60A60C67A02AF4D860000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0xDBEA087636977705" QueryPlanHash="0x5843A168DB7EC108" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="480"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="33" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek from start, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek from start, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="6" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="4" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="4" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(1)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="18" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


1
1
Seek from start, offset 0
First page, relative to origin

2
1
Seek from start, offset 0
First page, relative to origin

3
1
Seek from start, offset 0
First page, relative to origin




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek forward, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt; @PreviousMaxUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt; @PreviousMaxUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="19" StatementCompId="41" StatementType="SELECT" StatementSqlHandle="0x0900FB55315C719AF5A33D6C58E5D58C20B30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x78D1E731A3A08255" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="31" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek forward, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek forward, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="4" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="2" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(2)"></ColumnReference><ColumnReference Column="@PreviousMaxUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(3)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="20" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


4
2
Seek forward, offset 0
Next page

5
2
Seek forward, offset 0
Next page

6
2
Seek forward, offset 0
Next page




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek forward, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt; @PreviousMaxUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt; @PreviousMaxUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="21" StatementCompId="41" StatementType="SELECT" StatementSqlHandle="0x0900FB55315C719AF5A33D6C58E5D58C20B30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x78D1E731A3A08255" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="31" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek forward, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek forward, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="6660" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="8326" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="4996" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="20" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="4996" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3331" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="14" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3331" ActualEndOfScans="0" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(6657)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(2222)"></ColumnReference><ColumnReference Column="@PreviousMaxUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(6)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="22" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="3" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


9996
2222
Seek forward, offset 6657
Skip ahead, near the end (costly scan)

9997
2222
Seek forward, offset 6657
Skip ahead, near the end (costly scan)

9998
2222
Seek forward, offset 6657
Skip ahead, near the end (costly scan)




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek forward, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt; @PreviousMaxUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt; @PreviousMaxUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="23" StatementCompId="41" StatementType="SELECT" StatementSqlHandle="0x0900FB55315C719AF5A33D6C58E5D58C20B30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x78D1E731A3A08255" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="31" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek forward, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek forward, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="2" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="1" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="1" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(2223)"></ColumnReference><ColumnReference Column="@PreviousMaxUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(9998)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="24" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="1" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


10000
2223
Seek forward, offset 0
Next (last) page




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek forward, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        WHERE A.UserId &gt; @PreviousMaxUserId&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;        WHERE B.UserId &gt; @PreviousMaxUserId&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="25" StatementCompId="41" StatementType="SELECT" StatementSqlHandle="0x0900FB55315C719AF5A33D6C58E5D58C20B30000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0x78D1E731A3A08255" QueryPlanHash="0xD3D267B832B43C5B" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="504"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="31" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek forward, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek forward, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Seek" LogicalOp="Index Seek" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="2" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object><SeekPredicates><SeekPredicateNew><SeekKeys><StartRange ScanType="GT"><RangeColumns><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></RangeColumns><RangeExpressions><ScalarOperator ScalarString="[@PreviousMaxUserId]"><Identifier><ColumnReference Column="@PreviousMaxUserId"></ColumnReference></Identifier></ScalarOperator></RangeExpressions></StartRange></SeekKeys></SeekPredicateNew></SeekPredicates></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(0)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(2224)"></ColumnReference><ColumnReference Column="@PreviousMaxUserId" ParameterDataType="int" ParameterCompiledValue="(0)" ParameterRuntimeValue="(10000)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="26" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="0" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="SELECT U.UserId&#xa;        , @PageNumber AS PageNumber&#xa;        , CONCAT(&apos;Seek from start, offset &apos;, @Offset) AS Algorithm&#xa;    FROM (&#xa;        SELECT A.UserId&#xa;        FROM TableA A&#xa;        UNION ALL&#xa;        SELECT B.UserId&#xa;        FROM TableB B&#xa;    ) U&#xa;    GROUP BY U.UserId&#xa;    ORDER BY U.UserId&#xa;    OFFSET @Offset ROWS&#xa;    FETCH NEXT @PageSize ROWS ONLY" StatementId="27" StatementCompId="31" StatementType="SELECT" StatementSqlHandle="0x090019F46B3D5C4B13E60A60C67A02AF4D860000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="2" ParentObjectId="981578535" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0130213" StatementEstRows="3" SecurityPolicyApplied="false" StatementOptmLevel="FULL" QueryHash="0xDBEA087636977705" QueryPlanHash="0x5843A168DB7EC108" StatementOptmEarlyAbortReason="GoodEnoughPlanFound" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="NoParallelPlansInDesktopOrExpressEdition" CachedPlanSize="32" CompileTime="0" CompileCPU="0" CompileMemory="480"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><OptimizerStatsUsage><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableB]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[PK_TableA]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableA_UserId]" Table="[TableA]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo><StatisticsInfo LastUpdate="2023-11-29T20:38:41.22" ModificationCount="0" SamplingPercent="100" Statistics="[IX_TableB_UserId]" Table="[TableB]" Schema="[dbo]" Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]"></StatisticsInfo></OptimizerStatsUsage><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Compute Scalar" LogicalOp="Compute Scalar" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="33" EstimatedTotalSubtreeCost="0.0130213" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Column="Expr1003"></ColumnReference></OutputList><ComputeScalar><DefinedValues><DefinedValue><ColumnReference Column="Expr1003"></ColumnReference><ScalarOperator ScalarString="concat(&apos;Seek from start, offset &apos;,CONVERT_IMPLICIT(varchar(12),[@Offset],0))"><Identifier><ColumnReference Column="ConstExpr1004"><ScalarOperator><Intrinsic FunctionName="concat"><ScalarOperator><Const ConstValue="&apos;Seek from start, offset &apos;"></Const></ScalarOperator><ScalarOperator><Convert DataType="varchar" Length="12" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></Intrinsic></ScalarOperator></ColumnReference></Identifier></ScalarOperator></DefinedValue></DefinedValues><RelOp NodeId="1" PhysicalOp="Top" LogicalOp="Top" EstimateRows="3" EstimateIO="0" EstimateCPU="3e-07" AvgRowSize="11" EstimatedTotalSubtreeCost="0.013021" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Top RowCount="0" IsPercent="0" WithTies="0"><OffsetExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@Offset],0)"><Identifier><ColumnReference Column="ConstExpr1006"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@Offset"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></OffsetExpression><TopExpression><ScalarOperator ScalarString="CONVERT_IMPLICIT(bigint,[@PageSize],0)"><Identifier><ColumnReference Column="ConstExpr1005"><ScalarOperator><Convert DataType="bigint" Style="0" Implicit="1"><ScalarOperator><Identifier><ColumnReference Column="@PageSize"></ColumnReference></Identifier></ScalarOperator></Convert></ScalarOperator></ColumnReference></Identifier></ScalarOperator></TopExpression><RelOp NodeId="2" PhysicalOp="Stream Aggregate" LogicalOp="Aggregate" EstimateRows="3" EstimateRowsWithoutRowGoal="6667" EstimateIO="0" EstimateCPU="0.007501" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130207" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="6667" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><StreamAggregate><DefinedValues></DefinedValues><GroupBy><ColumnReference Column="Union1002"></ColumnReference></GroupBy><RelOp NodeId="3" PhysicalOp="Merge Join" LogicalOp="Concatenation" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="8335" EstimateIO="0" EstimateCPU="0.023937" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0130173" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Column="Union1002"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="8335" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Merge><DefinedValues><DefinedValue><ColumnReference Column="Union1002"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><RelOp NodeId="4" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="3.75056" EstimateRowsWithoutRowGoal="5000" EstimatedRowsRead="5000" EstimateIO="0.0157176" EstimateCPU="0.005657" AvgRowSize="11" EstimatedTotalSubtreeCost="0.00329305" TableCardinality="5000" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="5000" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="20" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="5000" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Alias="[A]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableA]" Index="[IX_TableA_UserId]" Alias="[A]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp><RelOp NodeId="5" PhysicalOp="Index Scan" LogicalOp="Index Scan" EstimateRows="1" EstimateRowsWithoutRowGoal="3335" EstimatedRowsRead="3335" EstimateIO="0.0112731" EstimateCPU="0.0038255" AvgRowSize="11" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="3335" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="3335" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="1" ActualLogicalReads="14" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualRowsRead="3335" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><IndexScan Ordered="1" ScanDirection="FORWARD" ForcedIndex="0" ForceSeek="0" ForceScan="0" NoExpandHint="0" Storage="RowStore"><DefinedValues><DefinedValue><ColumnReference Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Alias="[B]" Column="UserId"></ColumnReference></DefinedValue></DefinedValues><Object Database="[fiddle_b2ac55035a3e43aca7e14c408b28c15c]" Schema="[dbo]" Table="[TableB]" Index="[IX_TableB_UserId]" Alias="[B]" IndexKind="NonClustered" Storage="RowStore"></Object></IndexScan></RelOp></Merge></RelOp></StreamAggregate></RelOp></Top></RelOp></ComputeScalar></RelOp><ParameterList><ColumnReference Column="@PageSize" ParameterDataType="int" ParameterCompiledValue="(3)" ParameterRuntimeValue="(3)"></ColumnReference><ColumnReference Column="@Offset" ParameterDataType="int" ParameterRuntimeValue="(6666)"></ColumnReference><ColumnReference Column="@PageNumber" ParameterDataType="int" ParameterCompiledValue="(100)" ParameterRuntimeValue="(2223)"></ColumnReference></ParameterList></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




Microsoft SQL Server 2005 XML Showplan


<ShowPlanXML xmlns="http://schemas.microsoft.com/sqlserver/2004/07/showplan" Version="1.564" Build="16.0.1000.6"><BatchSequence><Batch><Statements><StmtSimple StatementText="INSERT @Results&#xa;    EXEC GetPagedUserIdsExtended  --  &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; Here it is&#xa;        @PageSize,&#xa;        @PageNumber,&#xa;        @PreviousPageNumber,&#xa;        @PreviousMinUserId,&#xa;        @PreviousMaxUserId" StatementId="28" StatementCompId="14" StatementType="INSERT EXEC" StatementSqlHandle="0x09004572ED2D00FF578F90D0DE180D16EC1C0000000000000000000000000000000000000000000000000000" DatabaseContextSettingsId="1" ParentObjectId="0" BatchSqlHandle="0x02000000247DB328FAC8669639C663A023D91A30CBDFDC4D0000000000000000000000000000000000000000" StatementParameterizationType="0" RetrievedFromCache="true" StatementSubTreeCost="0.0132841" StatementEstRows="1" SecurityPolicyApplied="false" StatementOptmLevel="TRIVIAL" QueryHash="0xD47172BCA499D2AE" QueryPlanHash="0xFA40A18CCC51CDA8" CardinalityEstimationModelVersion="160"><StatementSetOptions QUOTED_IDENTIFIER="true" ARITHABORT="true" CONCAT_NULL_YIELDS_NULL="true" ANSI_NULLS="true" ANSI_PADDING="true" ANSI_WARNINGS="true" NUMERIC_ROUNDABORT="false"></StatementSetOptions><QueryPlan DegreeOfParallelism="0" NonParallelPlanReason="TableVariableTransactionsDoNotSupportParallelNestedTransaction" CachedPlanSize="24" CompileTime="0" CompileCPU="0" CompileMemory="336"><MemoryGrantInfo SerialRequiredMemory="0" SerialDesiredMemory="0" GrantedMemory="0" MaxUsedMemory="0"></MemoryGrantInfo><OptimizerHardwareDependentProperties EstimatedAvailableMemoryGrant="1258238" EstimatedPagesCached="78639" EstimatedAvailableDegreeOfParallelism="1" MaxCompileMemory="1227096"></OptimizerHardwareDependentProperties><TraceFlags IsCompileTime="1"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><TraceFlags IsCompileTime="0"><TraceFlag Value="460" Scope="Global"></TraceFlag><TraceFlag Value="8017" Scope="Global"></TraceFlag></TraceFlags><QueryTimeStats ElapsedTime="0" CpuTime="0"></QueryTimeStats><RelOp NodeId="0" PhysicalOp="Table Insert" LogicalOp="Insert" EstimateRows="1" EstimateIO="0.01" EstimateCPU="1e-06" AvgRowSize="9" EstimatedTotalSubtreeCost="0.0132841" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="1" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><Update DMLRequestSort="0"><Object Table="[@Results]" Storage="RowStore"></Object><SetPredicate><ScalarOperator ScalarString="[UserId] = [Parameter Table].[UserId] as [ParameterTable].[UserId],[PageNumber] = [Parameter Table].[PageNumber] as [ParameterTable].[PageNumber],[Algorithm] = [Parameter Table].[Algorithm] as [ParameterTable].[Algorithm]"><ScalarExpressionList><ScalarOperator><MultipleAssign><Assign><ColumnReference Column="UserId"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="PageNumber"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference></Identifier></ScalarOperator></Assign><Assign><ColumnReference Column="Algorithm"></ColumnReference><ScalarOperator><Identifier><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></Identifier></ScalarOperator></Assign></MultipleAssign></ScalarOperator></ScalarExpressionList></ScalarOperator></SetPredicate><RelOp NodeId="1" PhysicalOp="Parameter Table Scan" LogicalOp="Parameter Table Scan" EstimateRows="1" EstimatedRowsRead="1" EstimateIO="0.0032035" EstimateCPU="7.96e-05" AvgRowSize="69" EstimatedTotalSubtreeCost="0.0032831" TableCardinality="0" Parallel="0" EstimateRebinds="0" EstimateRewinds="0" EstimatedExecutionMode="Row"><OutputList><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="UserId"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="PageNumber"></ColumnReference><ColumnReference Table="[Parameter Table]" Alias="[ParameterTable]" Column="Algorithm"></ColumnReference></OutputList><RunTimeInformation><RunTimeCountersPerThread Thread="0" ActualRows="1" Batches="0" ActualElapsedms="0" ActualCPUms="0" ActualScans="0" ActualLogicalReads="0" ActualPhysicalReads="0" ActualReadAheads="0" ActualLobLogicalReads="0" ActualLobPhysicalReads="0" ActualLobReadAheads="0" ActualEndOfScans="1" ActualExecutions="1" ActualExecutionMode="Row"></RunTimeCountersPerThread></RunTimeInformation><ParameterTableScan></ParameterTableScan></RelOp></Update></RelOp></QueryPlan></StmtSimple></Statements></Batch></BatchSequence></ShowPlanXML>




UserId
PageNumber
Algorithm
(No column name)


10000
2223
Seek from start, offset 6666
Prior (last) page (requires a costly scan from start)
UserId	PageNumber	Algorithm	(No column name)
446	100	Seek from start, offset 297	Initial request, relative to origin (costly, but necessary)
448	100	Seek from start, offset 297	Initial request, relative to origin (costly, but necessary)
450	100	Seek from start, offset 297	Initial request, relative to origin (costly, but necessary)
UserId	PageNumber	Algorithm	(No column name)
451	101	Seek forward, offset 0	Next page
452	101	Seek forward, offset 0	Next page
454	101	Seek forward, offset 0	Next page
UserId	PageNumber	Algorithm	(No column name)
464	104	Seek forward, offset 6	Skip ahead several pages
466	104	Seek forward, offset 6	Skip ahead several pages
468	104	Seek forward, offset 6	Skip ahead several pages
UserId	PageNumber	Algorithm	(No column name)
469	105	Seek same page, offset 0	Same page
470	105	Seek same page, offset 0	Same page
472	105	Seek same page, offset 0	Same page
UserId	PageNumber	Algorithm	(No column name)
464	104	Seek backwards, offset 0	Prior page
466	104	Seek backwards, offset 0	Prior page
468	104	Seek backwards, offset 0	Prior page
UserId	PageNumber	Algorithm	(No column name)
446	100	Seek backwards, offset 9	Skip back several pages
448	100	Seek backwards, offset 9	Skip back several pages
450	100	Seek backwards, offset 9	Skip back several pages
UserId	PageNumber	Algorithm	(No column name)
10	3	Seek from start, offset 6	Skip way back, retrieved relative to origin
12	3	Seek from start, offset 6	Skip way back, retrieved relative to origin
13	3	Seek from start, offset 6	Skip way back, retrieved relative to origin
UserId	PageNumber	Algorithm	(No column name)
1	1	Seek from start, offset 0	First page, relative to origin
2	1	Seek from start, offset 0	First page, relative to origin
3	1	Seek from start, offset 0	First page, relative to origin
UserId	PageNumber	Algorithm	(No column name)
9996	2222	Seek forward, offset 6657	Skip ahead, near the end (costly scan)
9997	2222	Seek forward, offset 6657	Skip ahead, near the end (costly scan)
9998	2222	Seek forward, offset 6657	Skip ahead, near the end (costly scan)