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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?.
ERROR: syntax error at or near "x"
LINE 11: x.a.a.c := true; -- Syntax error
^
ERROR: "x.a.a" is not a known variable
LINE 7: x.a.a := z.a.a ;
^
ERROR: syntax error at or near "("
LINE 7: (x.a).a := z.a.a ;
^