Ticket #19259: 19259.diff

django/db/backends/postgresql_psycopg2/base.py

@@ -194 +194 @@
                             self.ops.set_time_zone_sql(), [tz])
             self.connection.set_isolation_level(self.isolation_level)
             self._get_pg_version()
+            if self.pg_version >= 90100:
+                self.features.allows_group_by_pk = True
             connection_created.send(sender=self.__class__, connection=self)
         cursor = self.connection.cursor()
         cursor.tzinfo_factory = utc_tzinfo_factory if settings.USE_TZ else None