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. Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/d2d79887eadff72c339a072ef693bb6016651d30 Modified Files -------------- src/backend/optimizer/plan/planner.c | 23 ++++++++++++++++++++++- src/test/regress/expected/groupingsets.out | 12 ++++++++++++ src/test/regress/sql/groupingsets.sql | 5 +++++ 3 files changed, 39 insertions(+), 1 deletion(-)
