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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?.
country_id | country |
---|---|
111 | INDIA |
222 | CANADA |
333 | USA |
3 rows affected
1 rows affected
country_id | country |
---|---|
111 | INDIA |
222 | CANADA |
333 | USA |
444 | JAPAN |
country_id | country |
---|---|
111 | INDIA |
333 | USA |
444 | JAPAN |
222 | CANADA |