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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 10.23 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-15), 64-bit |
SELECT 1
CREATE TABLE
CREATE TABLE
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
INSERT 0 1
coalesce | coalesce | coalesce | coalesce |
---|---|---|---|
src_1 | dest_1 | 7 | 0 |
src_2 | dest_2 | 2 | 5 |
src_3 | dest_3 | 5 | 2 |
src_4 | dest_4 | 6 | 3 |
src_5 | dest_5 | 9 | 9 |
SELECT 5