Repair crash with unsortable grouping sets.
Andrew Gierth <rhodiumtoad@postgresql.org>
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.
Files
| Path | Change | +/− |
|---|---|---|
| src/backend/optimizer/plan/planner.c | modified | +22 −1 |
| src/test/regress/expected/groupingsets.out | modified | +12 −0 |
| src/test/regress/sql/groupingsets.sql | modified | +5 −0 |