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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?.
1 rows affected
4 rows affected
ar1 ar2
{32,91,13,52,21} {65,1,66,78,26}
{90,55,31,3,21} {91,72,54,37,66}
{90,31,27,45,111} {32,72,101,13,74}