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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 11.4 (Debian 11.4-1.pgdg90+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516, 64-bit |
| arr | to_json |
|---|---|
| [-2:5]={-2,-1,0,1,2,3,4,5} | [-2,-1,0,1,2,3,4,5] |
| [0:5]={0,1,2,3,4,5} | [0,1,2,3,4,5] |
| {1,2,3,4} | [1,2,3,4] |
| [3:8]={3,4,5,6,7,8} | [3,4,5,6,7,8] |