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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?.
version |
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PostgreSQL 15.0 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-10), 64-bit |
SELECT 1
CREATE TABLE
BEGIN
pg_current_xact_id | txid_current | txid_current_snapshot |
---|---|---|
2630842 | 2630842 | 2630842:2630842: |
SELECT 1
INSERT 0 1
id |
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1 |
SELECT 1
BEGIN
pg_current_xact_id | txid_current | txid_current_snapshot |
---|---|---|
2630842 | 2630842 | 2630842:2630842: |
SELECT 1
INSERT 0 1
id |
---|
1 |
2 |
SELECT 2
SAVEPOINT
ROLLBACK
pg_current_xact_id | txid_current | txid_current_snapshot |
---|---|---|
2630843 | 2630843 | 2630843:2630843: |
SELECT 1
id |
---|
SELECT 0
BEGIN
pg_current_xact_id | txid_current | txid_current_snapshot |
---|---|---|
2630844 | 2630844 | 2630844:2630844: |
SELECT 1
INSERT 0 1
id |
---|
3 |
SELECT 1
SAVEPOINT
pg_current_xact_id | txid_current | txid_current_snapshot |
---|---|---|
2630844 | 2630844 | 2630844:2630844: |
SELECT 1
INSERT 0 1
id |
---|
3 |
4 |
SELECT 2
SAVEPOINT
ROLLBACK
pg_current_xact_id | txid_current | txid_current_snapshot |
---|---|---|
2630844 | 2630844 | 2630844:2630846: |
SELECT 1
id |
---|
3 |
SELECT 1