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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?.
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PostgreSQL 12.0 (Debian 12.0-1.pgdg90+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516, 64-bit |
5 rows affected
key | value |
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1 | 5 |
2 | 6 |
2 | 7 |
2 | 8 |
4 | 9 |
key |
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1 |
4 |
key | value |
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1 | 5 |
4 | 9 |