Fix crash in assign_collations_walker for EXISTS with empty SELECT list.
We (I think I, actually) forgot about this corner case while coding
collation resolution. Per bug #8648 from Arjen Nienhuis.
Branch
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REL9_3_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/b44ae4893db20233b470e41916b67799a1738bf4
Modified Files
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src/backend/parser/parse_collate.c | 10 ++++++++--
src/test/regress/expected/subselect.out | 10 ++++++++++
src/test/regress/sql/subselect.sql | 6 ++++++
3 files changed, 24 insertions(+), 2 deletions(-)