pgsql/src/backend/optimizer/prep prepunion.c

Tom, thanks for fixing this. I couldn't verify the bug because the test
case was so complex.

CVSROOT: /home/projects/pgsql/cvsroot
Module name: pgsql
Changes by: tgl@hub.org 01/08/14 13:12:57

Modified files:
src/backend/optimizer/prep: prepunion.c

Log message:
Fix brokenness of nested EXCEPT/INTERSECT queries. prepunion was being
a tad sloppy about generating the targetlist for some nodes, by generating
a tlist entry that claimed to be a constant when the value wasn't actually
constant. This caused setrefs.c to do the wrong thing later on.

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