Log Message:
-----------
get_expr_result_type probably needs to be able to handle OpExpr as well
as FuncExpr, to cover cases where a function returning tuple is invoked
via an operator.
Modified Files:
--------------
pgsql/src/backend/utils/fmgr:
funcapi.c (r1.20 -> r1.21)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/fmgr/funcapi.c.diff?r1=1.20&r2=1.21)