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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?.
7 rows affected
group_id | parent |
---|---|
3 | X |
2 | E |
2 | D |
1 | A |
1 | B |
2 | C |
3 | Y |
group_id | child |
---|---|
1 | E |
2 | F |
2 | G |
group_id | parent | child |
---|---|---|
1 | A | E |
1 | B | E |
2 | C | F |
2 | D | F |
2 | E | F |
2 | C | G |
2 | D | G |
2 | E | G |