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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 |
|---|
| PostgreSQL 9.6.14 on x86_64-pc-linux-gnu (Debian 9.6.14-1.pgdg80+1), compiled by gcc (Debian 4.9.2-10+deb8u2) 4.9.2, 64-bit |
| phone | spec |
|---|---|
| 1 | Lock, Full, Face |
| 2 | Lock, '', Face |
| 3 | '', Scan, '' |