Log Message:
-----------
Extend relation_excluded_by_constraints() to check for mutually
contradictory WHERE-clauses applied to a relation. This makes the
GUC variable constraint_exclusion rather inappropriately named,
but I've refrained for the moment from renaming it.
Per example from Martin Lesser.
Modified Files:
--------------
pgsql/src/backend/optimizer/util:
plancat.c (r1.123 -> r1.124)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/plancat.c.diff?r1=1.123&r2=1.124)