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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2020-10-06 11:43:53 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2020-10-06 11:43:53 -0400 |
| commit | b7f166efade004ba293f52b672961ae064d202cd (patch) | |
| tree | d0d1a69f2ea3832075e6917c2cc87e78146f9698 /src/backend/utils/adt/jsonpath_exec.c | |
| parent | 96423711918f44600c9ef91f4342984624f053bb (diff) | |
| download | postgresql-b7f166efade004ba293f52b672961ae064d202cd.tar.gz postgresql-b7f166efade004ba293f52b672961ae064d202cd.zip | |
Build EC members for child join rels in the right memory context.
This patch prevents crashes or wrong plans when partition-wise joins
are considered during GEQO planning, as a consequence of the
EquivalenceClass data structures becoming corrupt after a GEQO
context reset.
A remaining problem is that successive GEQO cycles will make multiple
copies of the required EC members, since add_child_join_rel_equivalences
has no idea that such members might exist already. For now we'll just
live with that. The lack of field complaints of crashes suggests that
this is a mighty little-used situation.
Back-patch to v12 where this code was introduced.
Discussion: https://postgr.es/m/1683100.1601860653@sss.pgh.pa.us
Diffstat (limited to 'src/backend/utils/adt/jsonpath_exec.c')
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