Prevent failure when RowExpr or XmlExpr is parse-analyzed twice.
transformExpr() is required to cope with already-transformed expression
trees, for various ugly-but-not-quite-worth-cleaning-up reasons. However,
some of its newer subroutines hadn't gotten the memo. This accounts for
bug #7763 from Norbert Buchmuller: transformRowExpr() was overwriting the
previously determined type of a RowExpr during CREATE TABLE LIKE INCLUDING
INDEXES. Additional investigation showed that transformXmlExpr had the
same kind of problem, but all the other cases seem to be safe.
Andres Freund and Tom Lane
Branch
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REL9_1_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/628ea7ea51e046bade9ce7f15dc9c41118e29f13
Modified Files
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src/backend/parser/gram.y | 1 +
src/backend/parser/parse_expr.c | 19 +++++++++++++++++--
src/include/nodes/primnodes.h | 3 ++-
3 files changed, 20 insertions(+), 3 deletions(-)