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Planner, check if can use consider HASH for groupings (src/backend/optimizer/plan/planner.c) - Mailing list pgsql-hackers

From Ranier Vilela
Subject Planner, check if can use consider HASH for groupings (src/backend/optimizer/plan/planner.c)
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Msg-id CAEudQApmiG_zBcA98FFXueW0-752SZ5g3CU6PjL7+MZ+0C6Wkw@mail.gmail.com
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Responses Re: Planner, check if can use consider HASH for groupings (src/backend/optimizer/plan/planner.c)  (Tomas Vondra <tomas.vondra@2ndquadrant.com>)
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Hi,

In case gd->any_hashable is FALSE, grouping_is_hashable is never called.
In this case, the planner could use HASH for groupings, but will never know.

Apparently gd pointer, will never be NULL there, verified with Assert(gd != NULL).

regards,
Ranier Vilela
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