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Repair crash with unsortable grouping sets.

author Andrew Gierth <rhodiumtoad@postgresql.org>

2018年3月21日 10:42:04 +0000 (10:42 +0000)

committer Andrew Gierth <rhodiumtoad@postgresql.org>

2018年3月21日 11:39:28 +0000 (11:39 +0000)

commit d2d79887eadff72c339a072ef693bb6016651d30

tree dc777dcbe00114aef09beeb6bdc2eea6524202b7 tree

parent aea7c17e86e99a7ed4da489b3df2b5493b5e5e95 commit | diff

Repair crash with unsortable grouping sets.

If there were multiple grouping sets, none of them empty, all of which
were unsortable, then an oversight in consider_groupingsets_paths led
to a null pointer dereference. Fix, and add a regression test for this
case.

Per report from Dang Minh Huong, though I didn't use their patch.

Backpatch to 10.x where hashed grouping sets were added.

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

src/test/regress/expected/groupingsets.out diff | blob | blame | history

src/test/regress/sql/groupingsets.sql diff | blob | blame | history

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