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-rw-r--r--django/db/backends/postgresql_psycopg2/operations.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/django/db/backends/postgresql_psycopg2/operations.py b/django/db/backends/postgresql_psycopg2/operations.py
index acfeeaf7ac..949a05c0b6 100644
--- a/django/db/backends/postgresql_psycopg2/operations.py
+++ b/django/db/backends/postgresql_psycopg2/operations.py
@@ -179,6 +179,12 @@ class DatabaseOperations(BaseDatabaseOperations):
return 63
+ def distinct_sql(self, fields):
+ if fields:
+ return 'DISTINCT ON (%s)' % ', '.join(fields)
+ else:
+ return 'DISTINCT'
+
def last_executed_query(self, cursor, sql, params):
# http://initd.org/psycopg/docs/cursor.html#cursor.query
# The query attribute is a Psycopg extension to the DB API 2.0.