Fixed #19968 -- Dropped support for PostgreSQL < 8.4.

1 files changed, 4 insertions, 15 deletions

diff --git a/django/db/backends/postgresql_psycopg2/operations.py b/django/db/backends/postgresql_psycopg2/operations.py
index a210f87ccd..b17a0c17bb 100644
--- a/django/db/backends/postgresql_psycopg2/operations.py
+++ b/django/db/backends/postgresql_psycopg2/operations.py
@@ -9,7 +9,7 @@ class DatabaseOperations(BaseDatabaseOperations):
         super(DatabaseOperations, self).__init__(connection)
 
     def date_extract_sql(self, lookup_type, field_name):
-        # http://www.postgresql.org/docs/8.0/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT
+        # http://www.postgresql.org/docs/current/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT
         if lookup_type == 'week_day':
             # For consistency across backends, we return Sunday=1, Saturday=7.
             return "EXTRACT('dow' FROM %s) + 1" % field_name
@@ -34,7 +34,7 @@ class DatabaseOperations(BaseDatabaseOperations):
         return '(%s)' % conn.join([sql, 'interval \'%s\'' % mods])
 
     def date_trunc_sql(self, lookup_type, field_name):
-        # http://www.postgresql.org/docs/8.0/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC
+        # http://www.postgresql.org/docs/current/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC
         return "DATE_TRUNC('%s', %s)" % (lookup_type, field_name)
 
     def datetime_extract_sql(self, lookup_type, field_name, tzname):
@@ -43,7 +43,7 @@ class DatabaseOperations(BaseDatabaseOperations):
             params = [tzname]
         else:
             params = []
-        # http://www.postgresql.org/docs/8.0/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT
+        # http://www.postgresql.org/docs/current/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT
         if lookup_type == 'week_day':
             # For consistency across backends, we return Sunday=1, Saturday=7.
             sql = "EXTRACT('dow' FROM %s) + 1" % field_name
@@ -57,7 +57,7 @@ class DatabaseOperations(BaseDatabaseOperations):
             params = [tzname]
         else:
             params = []
-        # http://www.postgresql.org/docs/8.0/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC
+        # http://www.postgresql.org/docs/current/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC
         sql = "DATE_TRUNC('%s', %s)" % (lookup_type, field_name)
         return sql, params
 
@@ -178,17 +178,6 @@ class DatabaseOperations(BaseDatabaseOperations):
     def prep_for_iexact_query(self, x):
         return x
 
-    def check_aggregate_support(self, aggregate):
-        """Check that the backend fully supports the provided aggregate.
-
-        The implementation of population statistics (STDDEV_POP and VAR_POP)
-        under Postgres 8.2 - 8.2.4 is known to be faulty. Raise
-        NotImplementedError if this is the database in use.
-        """
-        if aggregate.sql_function in ('STDDEV_POP', 'VAR_POP'):
-            if 80200 <= self.connection.pg_version <= 80204:
-                raise NotImplementedError('PostgreSQL 8.2 to 8.2.4 is known to have a faulty implementation of %s. Please upgrade your version of PostgreSQL.' % aggregate.sql_function)
-
     def max_name_length(self):
         """
         Returns the maximum length of an identifier.