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Department of second thoughts: the rule that ORDER BY and DISTINCT are

author Tom Lane <tgl@sss.pgh.pa.us>

2008年3月28日 02:00:11 +0000 (02:00 +0000)

committer Tom Lane <tgl@sss.pgh.pa.us>

2008年3月28日 02:00:11 +0000 (02:00 +0000)

commit 2e4094dad86bd0d2a55bf6a47ae9c75068afadc4

tree 7e56f5da578e565824feabda1def2a637cb97a66 tree

parent 7692d8d5b72f510bd84f708d0a8e53c548f71adc commit | diff

Department of second thoughts: the rule that ORDER BY and DISTINCT are
useless for an ungrouped-aggregate query holds regardless of whether
optimize_minmax_aggregates succeeds. So we might as well apply the
optimization in any case.

I'll leave 8.3 as it was, since this version is a tad more invasive
than my earlier patch.

src/backend/optimizer/plan/planner.c diff | blob | blame | history

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