| From: | David Rowley <drowley(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Trim ORDER BY/DISTINCT aggregate pathkeys in gather_grouping_pat |
| Date: | 2024-03-14 22:56:08 |
| Message-ID: | E1rktzb-003p3b-Ty@gemulon.postgresql.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-committers |
Trim ORDER BY/DISTINCT aggregate pathkeys in gather_grouping_paths
Similar to d8a295389, trim off any PathKeys which are for ORDER BY /
DISTINCT aggregate functions from the PathKey List for the Gather Merge
paths created by gather_grouping_paths(). These additional PathKeys are
not valid to use after grouping has taken place as these PathKeys belong
to columns which are inputs to an aggregate function and, therefore are
unavailable after aggregation.
Reported-by: Alexander Lakhin
Discussion: https://postgr.es/m/cf63174c-8c89-3953-cb49-48f41f74941a@gmail.com
Backpatch-through: 16, where 1349d2790 was added
Branch
------
REL_16_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/4e1ff2aadefbfbf798a4d318514ac85b2fbdc5aa
Modified Files
--------------
src/backend/optimizer/plan/planner.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Michael Paquier | 2024-03-14 22:57:32 | pgsql: Refactor initial hash lookup in dynahash.c |
| Previous Message | David Rowley | 2024-03-14 22:55:43 | pgsql: Trim ORDER BY/DISTINCT aggregate pathkeys in gather_grouping_pat |