Log Message:
-----------
Feature T152 "DISTINCT predicate with negation" is supported.
Modified Files:
--------------
pgsql/src/backend/catalog:
sql_features.txt (r1.20 -> r1.21)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/sql_features.txt?r1=1.20&r2=1.21)