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| author | Tomas Vondra <tomas.vondra@postgresql.org> | 2020-12-21 18:58:32 +0100 |
|---|---|---|
| committer | Tomas Vondra <tomas.vondra@postgresql.org> | 2020-12-21 19:36:22 +0100 |
| commit | fac1b470a9f7e846534620b78ea4cf122ed432b2 (patch) | |
| tree | 1f744e28fef69e808d099b04d4abc6d2779f7285 /src/backend/utils/adt/encode.c | |
| parent | ff5d5611c01f60525c30b2c3ebc16d05edb7956d (diff) | |
| download | postgresql-fac1b470a9f7e846534620b78ea4cf122ed432b2.tar.gz postgresql-fac1b470a9f7e846534620b78ea4cf122ed432b2.zip | |
Disallow SRFs when considering sorts below Gather Merge
While we do allow SRFs in ORDER BY, scan/join processing should not
consider such cases - such sorts should only happen via final Sort atop
a ProjectSet. So make sure we don't try adding such sorts below Gather
Merge, just like we do for expressions that are volatile and/or not
parallel safe.
Backpatch to PostgreSQL 13, where this code was introduced as part of
the Incremental Sort patch.
Author: James Coleman
Reviewed-by: Tomas Vondra
Backpatch-through: 13
Discussion: https://postgr.es/m/CAAaqYe8cK3g5CfLC4w7bs=hC0mSksZC=H5M8LSchj5e5OxpTAg@mail.gmail.com
Discussion: https://postgr.es/m/295524.1606246314%40sss.pgh.pa.us
Diffstat (limited to 'src/backend/utils/adt/encode.c')
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