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

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.

docs/howto/custom-model-fields.txt

@@ -19,7 +19,7 @@ only the common types, such as ``VARCHAR`` and ``INTEGER``. For more obscure
 column types, such as geographic polygons or even user-created types such as
 `PostgreSQL custom types`_, you can define your own Django ``Field`` subclasses.
 
-.. _PostgreSQL custom types: http://www.postgresql.org/docs/8.2/interactive/sql-createtype.html
+.. _PostgreSQL custom types: http://www.postgresql.org/docs/current/interactive/sql-createtype.html
 
 Alternatively, you may have a complex Python object that can somehow be
 serialized to fit into a standard database column type. This is another case

docs/ref/contrib/gis/install/create_template_postgis-debian.sh

@@ -3,13 +3,6 @@
 GEOGRAPHY=0
 POSTGIS_SQL=postgis.sql
 
-# For Ubuntu 8.x and 9.x releases.
-if [ -d "/usr/share/postgresql-8.3-postgis" ]
-then
-    POSTGIS_SQL_PATH=/usr/share/postgresql-8.3-postgis
-    POSTGIS_SQL=lwpostgis.sql
-fi
-
 # For Ubuntu 10.04
 if [ -d "/usr/share/postgresql/8.4/contrib" ]
 then

docs/ref/contrib/gis/install/index.txt

@@ -61,7 +61,7 @@ supported versions, and any notes for each of the supported database backends:
 ==================  ==============================  ==================  =========================================
 Database            Library Requirements            Supported Versions  Notes
 ==================  ==============================  ==================  =========================================
-PostgreSQL          GEOS, PROJ.4, PostGIS           8.2+                Requires PostGIS.
+PostgreSQL          GEOS, PROJ.4, PostGIS           8.4+                Requires PostGIS.
 MySQL               GEOS                            5.x                 Not OGC-compliant; :ref:`limited functionality <mysql-spatial-limitations>`.
 Oracle              GEOS                            10.2, 11            XE not supported; not tested with 9.
 SQLite              GEOS, GDAL, PROJ.4, SpatiaLite  3.6.+               Requires SpatiaLite 2.3+, pysqlite2 2.5+

docs/ref/databases.txt

@@ -77,20 +77,7 @@ negating the effect of persistent connections.
 PostgreSQL notes
 ================
 
-Django supports PostgreSQL 8.2 and higher.
-
-PostgreSQL 8.2 to 8.2.4
------------------------
-
-The implementation of the population statistics aggregates ``STDDEV_POP`` and
-``VAR_POP`` that shipped with PostgreSQL 8.2 to 8.2.4 are `known to be
-faulty`_. Users of these releases of PostgreSQL are advised to upgrade to
-`Release 8.2.5`_ or later. Django will raise a ``NotImplementedError`` if you
-attempt to use the ``StdDev(sample=False)`` or ``Variance(sample=False)``
-aggregate with a database backend that falls within the affected release range.
-
-.. _known to be faulty: http://archives.postgresql.org/pgsql-bugs/2007-07/msg00046.php
-.. _Release 8.2.5: http://www.postgresql.org/docs/devel/static/release-8-2-5.html
+Django supports PostgreSQL 8.4 and higher.
 
 PostgreSQL connection settings
 -------------------------------
@@ -165,7 +152,7 @@ such as ``REPEATABLE READ`` or ``SERIALIZABLE``, set it in the
     handle exceptions raised on serialization failures. This option is
     designed for advanced uses.
 
-.. _postgresql-isolation-levels: http://www.postgresql.org/docs/devel/static/transaction-iso.html
+.. _postgresql-isolation-levels: http://www.postgresql.org/docs/current/static/transaction-iso.html
 
 Indexes for ``varchar`` and ``text`` columns
 --------------------------------------------
@@ -179,7 +166,7 @@ for the column.  The extra index is necessary to correctly perform
 lookups that use the ``LIKE`` operator in their SQL, as is done with the
 ``contains`` and ``startswith`` lookup types.
 
-.. _PostgreSQL operator class: http://www.postgresql.org/docs/8.4/static/indexes-opclass.html
+.. _PostgreSQL operator class: http://www.postgresql.org/docs/current/static/indexes-opclass.html
 
 .. _mysql-notes:
 

docs/ref/models/querysets.txt

@@ -628,7 +628,7 @@ object. If it's ``None``, Django uses the :ref:`current time zone
     - MySQL: load the time zone tables with `mysql_tzinfo_to_sql`_.
 
     .. _pytz: http://pytz.sourceforge.net/
-    .. _Time Zones: http://www.postgresql.org/docs/9.2/static/datatype-datetime.html#DATATYPE-TIMEZONES
+    .. _Time Zones: http://www.postgresql.org/docs/current/static/datatype-datetime.html#DATATYPE-TIMEZONES
     .. _Choosing a Time Zone File: http://docs.oracle.com/cd/B19306_01/server.102/b14225/ch4datetime.htm#i1006667
     .. _mysql_tzinfo_to_sql: http://dev.mysql.com/doc/refman/5.5/en/mysql-tzinfo-to-sql.html
 

docs/ref/settings.txt

@@ -557,7 +557,7 @@ backend-specific.
 Supported for the PostgreSQL_ (``postgresql_psycopg2``) and MySQL_ (``mysql``)
 backends.
 
-.. _PostgreSQL: http://www.postgresql.org/docs/8.2/static/multibyte.html
+.. _PostgreSQL: http://www.postgresql.org/docs/current/static/multibyte.html
 .. _MySQL: http://dev.mysql.com/doc/refman/5.0/en/charset-database.html
 
 .. setting:: TEST_COLLATION

docs/ref/unicode.txt

@@ -20,14 +20,14 @@ able to store certain characters in the database, and information will be lost.
 * MySQL users, refer to the `MySQL manual`_ (section 9.1.3.2 for MySQL 5.1)
   for details on how to set or alter the database character set encoding.
 
-* PostgreSQL users, refer to the `PostgreSQL manual`_ (section 21.2.2 in
-  PostgreSQL 8) for details on creating databases with the correct encoding.
+* PostgreSQL users, refer to the `PostgreSQL manual`_ (section 22.3.2 in
+  PostgreSQL 9) for details on creating databases with the correct encoding.
 
 * SQLite users, there is nothing you need to do. SQLite always uses UTF-8
   for internal encoding.
 
 .. _MySQL manual: http://dev.mysql.com/doc/refman/5.1/en/charset-database.html
-.. _PostgreSQL manual: http://www.postgresql.org/docs/8.2/static/multibyte.html#AEN24104
+.. _PostgreSQL manual: http://www.postgresql.org/docs/current/static/multibyte.html
 
 All of Django's database backends automatically convert Unicode strings into
 the appropriate encoding for talking to the database. They also automatically

docs/releases/1.6.txt

@@ -352,6 +352,17 @@ in an external repository`__.
 __ https://disqus.com/
 __ https://github.com/django/django-contrib-comments
 
+Support for PostgreSQL versions older than 8.4
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The end of upstream support periods was reached in December 2011 for
+PostgreSQL 8.2 and in February 2013 for 8.3. As a consequence, Django 1.6 sets
+8.4 as the minimum PostgreSQL version it officially supports.
+
+You're strongly encouraged to use the most recent version of PostgreSQL
+available, because of performance improvements and to take advantage of the
+native streaming replication available in PostgreSQL 9.x.
+
 Changes to :ttag:`cycle` and :ttag:`firstof`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

docs/topics/db/sql.txt

@@ -155,7 +155,7 @@ of people with their ages calculated by the database::
     Jane is 42.
     ...
 
-__ http://www.postgresql.org/docs/8.4/static/functions-datetime.html
+__ http://www.postgresql.org/docs/current/static/functions-datetime.html
 
 Passing parameters into ``raw()``
 ---------------------------------