Don't let transform_null_equals=on affect CASE foo WHEN NULL ... constructs.
transform_null_equals is only supposed to affect "foo = NULL" expressions
given directly by the user, not the internal "foo = NULL" expression
generated from CASE-WHEN.
This fixes bug #6242, reported by Sergey. Backpatch to all supported
branches.
Branch
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REL9_0_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/c02e52dfdc18605f263aa67d3b2563551222f719
Modified Files
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src/backend/parser/parse_expr.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)