Log Message:
-----------
Improve error wording of ORDER BY in UNION that uses new expressions in
ORDER BY.
Modified Files:
--------------
pgsql/src/backend/parser:
analyze.c (r1.355 -> r1.356)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/analyze.c.diff?r1=1.355&r2=1.356)