Thread: pgsql: Compare varnullingrels too in assign_param_for_var().

Compare varnullingrels too in assign_param_for_var().

Oversight in 2489d76c4.  Preliminary analysis suggests that the
problem may be unreachable --- but if we did have instances of
the same column with different varnullingrels, we'd surely need
to treat them as different Params.

Discussion: https://postgr.es/m/412552.1706203379@sss.pgh.pa.us

Branch
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REL_16_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/807369d80384cdaa696cd65b4fcee46e32142344

Modified Files
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src/backend/optimizer/util/paramassign.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)