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neqjoinsel must now pass through collation to eqjoinsel.

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Since commit 044c99bc5, eqjoinsel passes the passed-in collation
to any operators it invokes.  However, neqjoinsel failed to pass
on whatever collation it got, so that if we invoked a
collation-dependent operator via that code path, we'd get "could not
determine which collation to use for string comparison" or the like.

Per report from Justin Pryzby.  Back-patch to v12, like the previous
commit.

Discussion: https://postgr.es/m/20200721191606.GL5748@telsasoft.com
This commit is contained in:
Tom Lane 2020-07-21 19:40:44 -04:00
parent 4a70f829d8
commit bd0d893aa7
1 changed files with 9 additions and 6 deletions
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15
src/backend/utils/adt/selfuncs.c
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@ -2775,6 +2775,7 @@ neqjoinsel(PG_FUNCTION_ARGS)
List *args = (List *) PG_GETARG_POINTER(2);
JoinType jointype = (JoinType) PG_GETARG_INT16(3);
SpecialJoinInfo *sjinfo = (SpecialJoinInfo *) PG_GETARG_POINTER(4);
Oid collation = PG_GET_COLLATION();
float8 result;
if (jointype == JOIN_SEMI || jointype == JOIN_ANTI)
@ -2821,12 +2822,14 @@ neqjoinsel(PG_FUNCTION_ARGS)
if (eqop)
{
result = DatumGetFloat8(DirectFunctionCall5(eqjoinsel,
PointerGetDatum(root),
ObjectIdGetDatum(eqop),
PointerGetDatum(args),
Int16GetDatum(jointype),
PointerGetDatum(sjinfo)));
result =
DatumGetFloat8(DirectFunctionCall5Coll(eqjoinsel,
collation,
PointerGetDatum(root),
ObjectIdGetDatum(eqop),
PointerGetDatum(args),
Int16GetDatum(jointype),
PointerGetDatum(sjinfo)));
}
else
{