Log Message:
-----------
Fix bug I introduced in recent patch to make hash joins discard null tuples
immediately: ExecHashGetHashValue failed to restore the caller's memory
context before taking the failure exit.
Modified Files:
--------------
pgsql/src/backend/executor:
nodeHash.c (r1.110 -> r1.111)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeHash.c.diff?r1=1.110&r2=1.111)