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Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.
select version();
| version |
|---|
| PostgreSQL 9.6.20 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.3.1 20191121 (Red Hat 8.3.1-5), 64-bit |
CREATE TABLE PivotTable
(BerthId int, ShipType text, ShipSize text);
--Populate Sample records
INSERT INTO PivotTable VALUES(1,'Tanker','RoRo');
INSERT INTO PivotTable VALUES(1,'Tanker','small tanker');
INSERT INTO PivotTable VALUES(1,'Main Cargo', 'Small Main Cargo');
INSERT INTO PivotTable VALUES(2, 'Tanker', 'Small Tanker');
1 rows affected
1 rows affected
1 rows affected
1 rows affected