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Fix incorrect hash equality operator bug in Memoize

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In v14, because we don't have a field in RestrictInfo to cache both the
left and right type's hash equality operator, we just restrict the scope
of Memoize to only when the left and right types of a RestrictInfo are the
same.

In master we add another field to RestrictInfo and cache both hash
equality operators.

Reported-by: Jaime Casanova
Author: David Rowley
Discussion: https://postgr.es/m/20210929185544.GB24346%40ahch-to
Backpatch-through: 14
This commit is contained in:
David Rowley
2021-11-08 14:40:33 +13:00
parent e2fbb88372
commit 39a3105678
6 changed files with 54 additions and 22 deletions
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3
src/backend/nodes/copyfuncs.c
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@ -2362,7 +2362,8 @@ _copyRestrictInfo(const RestrictInfo *from)
COPY_SCALAR_FIELD(right_bucketsize);
COPY_SCALAR_FIELD(left_mcvfreq);
COPY_SCALAR_FIELD(right_mcvfreq);
COPY_SCALAR_FIELD(hasheqoperator);
COPY_SCALAR_FIELD(left_hasheqoperator);
COPY_SCALAR_FIELD(right_hasheqoperator);
return newnode;
}