Fixed #28552 -- Dropped support for MySQL 5.5.

4 files changed, 22 insertions, 38 deletions

diff --git a/docs/ref/contrib/gis/db-api.txt b/docs/ref/contrib/gis/db-api.txt
index cce38a3711..453eaef966 100644
--- a/docs/ref/contrib/gis/db-api.txt
+++ b/docs/ref/contrib/gis/db-api.txt
@@ -379,12 +379,12 @@ Function                              PostGIS  Oracle          MySQL        Spat
 :class:`Azimuth`                      X                                     X (LWGEOM)
 :class:`BoundingCircle`               X        X
 :class:`Centroid`                     X        X               X            X
-:class:`Difference`                   X        X               X (≥ 5.6.1)  X
-:class:`Distance`                     X        X               X (≥ 5.6.1)  X
+:class:`Difference`                   X        X               X            X
+:class:`Distance`                     X        X               X            X
 :class:`Envelope`                     X                        X            X
 :class:`ForceRHR`                     X
 :class:`GeoHash`                      X                        X (≥ 5.7.5)  X (LWGEOM)
-:class:`Intersection`                 X        X               X (≥ 5.6.1)  X
+:class:`Intersection`                 X        X               X            X
 :class:`IsValid`                      X        X               X (≥ 5.7.5)  X (LWGEOM)
 :class:`Length`                       X        X               X            X
 :class:`LineLocatePoint`              X                                     X
@@ -397,10 +397,10 @@ Function                              PostGIS  Oracle          MySQL        Spat
 :class:`Reverse`                      X        X                            X
 :class:`Scale`                        X                                     X
 :class:`SnapToGrid`                   X                                     X
-:class:`SymDifference`                X        X               X (≥ 5.6.1)  X
+:class:`SymDifference`                X        X               X            X
 :class:`Transform`                    X        X                            X
 :class:`Translate`                    X                                     X
-:class:`Union`                        X        X               X (≥ 5.6.1)  X
+:class:`Union`                        X        X               X            X
 ====================================  =======  ==============  ===========  ==========
 
 Aggregate Functions
diff --git a/docs/ref/contrib/gis/functions.txt b/docs/ref/contrib/gis/functions.txt
index bde36d443d..66099c3317 100644
--- a/docs/ref/contrib/gis/functions.txt
+++ b/docs/ref/contrib/gis/functions.txt
@@ -208,7 +208,7 @@ value of the geometry.
 
 .. class:: Difference(expr1, expr2, **extra)
 
-*Availability*: MySQL (≥ 5.6.1), `PostGIS
+*Availability*: MySQL, `PostGIS
 <https://postgis.net/docs/ST_Difference.html>`__, Oracle, SpatiaLite
 
 Accepts two geographic fields or expressions and returns the geometric
@@ -220,8 +220,8 @@ geometry B.
 
 .. class:: Distance(expr1, expr2, spheroid=None, **extra)
 
-*Availability*: MySQL (≥ 5.6.1), `PostGIS
-<https://postgis.net/docs/ST_Distance.html>`__, Oracle, SpatiaLite
+*Availability*: MySQL, `PostGIS <https://postgis.net/docs/ST_Distance.html>`__,
+Oracle, SpatiaLite
 
 Accepts two geographic fields or expressions and returns the distance between
 them, as a :class:`~django.contrib.gis.measure.Distance` object. On MySQL, a raw
@@ -307,7 +307,7 @@ __ https://en.wikipedia.org/wiki/Geohash
 
 .. class:: Intersection(expr1, expr2, **extra)
 
-*Availability*: MySQL (≥ 5.6.1), `PostGIS
+*Availability*: MySQL, `PostGIS
 <https://postgis.net/docs/ST_Intersection.html>`__, Oracle, SpatiaLite
 
 Accepts two geographic fields or expressions and returns the geometric
@@ -480,7 +480,7 @@ Number of Arguments  Description
 
 .. class:: SymDifference(expr1, expr2, **extra)
 
-*Availability*: MySQL (≥ 5.6.1), `PostGIS
+*Availability*: MySQL, `PostGIS
 <https://postgis.net/docs/ST_SymDifference.html>`__, Oracle, SpatiaLite
 
 Accepts two geographic fields or expressions and returns the geometric
@@ -522,8 +522,8 @@ parameters.
 
 .. class:: Union(expr1, expr2, **extra)
 
-*Availability*: MySQL (≥ 5.6.1), `PostGIS
-<https://postgis.net/docs/ST_Union.html>`__, Oracle, SpatiaLite
+*Availability*: MySQL, `PostGIS <https://postgis.net/docs/ST_Union.html>`__,
+Oracle, SpatiaLite
 
 Accepts two geographic fields or expressions and returns the union of both
 geometries.
diff --git a/docs/ref/contrib/gis/install/index.txt b/docs/ref/contrib/gis/install/index.txt
index acfbaa68a4..c547c9b268 100644
--- a/docs/ref/contrib/gis/install/index.txt
+++ b/docs/ref/contrib/gis/install/index.txt
@@ -59,7 +59,7 @@ supported versions, and any notes for each of the supported database backends:
 Database            Library Requirements            Supported Versions  Notes
 ==================  ==============================  ==================  =========================================
 PostgreSQL          GEOS, GDAL, PROJ.4, PostGIS     9.3+                Requires PostGIS.
-MySQL               GEOS, GDAL                      5.5+                Not OGC-compliant; :ref:`limited functionality <mysql-spatial-limitations>`.
+MySQL               GEOS, GDAL                      5.6+                Not OGC-compliant; :ref:`limited functionality <mysql-spatial-limitations>`.
 Oracle              GEOS, GDAL                      12.1+               XE not supported.
 SQLite              GEOS, GDAL, PROJ.4, SpatiaLite  3.6.+               Requires SpatiaLite 4.0+
 ==================  ==============================  ==================  =========================================
diff --git a/docs/ref/databases.txt b/docs/ref/databases.txt
index 821d6e8d1b..e7d474a81d 100644
--- a/docs/ref/databases.txt
+++ b/docs/ref/databases.txt
@@ -276,7 +276,7 @@ MySQL notes
 Version support
 ---------------
 
-Django supports MySQL 5.5 and higher.
+Django supports MySQL 5.6 and higher.
 
 Django's ``inspectdb`` feature uses the ``information_schema`` database, which
 contains detailed data on all database schemas.
@@ -294,36 +294,20 @@ Storage engines
 MySQL has several `storage engines`_. You can change the default storage engine
 in the server configuration.
 
-Until MySQL 5.5.4, the default engine was MyISAM_ [#]_. The main drawbacks of
-MyISAM are that it doesn't support transactions or enforce foreign-key
-constraints. On the plus side, it was the only engine that supported full-text
-indexing and searching until MySQL 5.6.4.
+MySQL's default storage engine is InnoDB_. This engine is fully transactional
+and supports foreign key references. It's the recommended choice. However, the
+InnoDB autoincrement counter is lost on a MySQL restart because it does not
+remember the ``AUTO_INCREMENT`` value, instead recreating it as "max(id)+1".
+This may result in an inadvertent reuse of :class:`~django.db.models.AutoField`
+values.
 
-Since MySQL 5.5.5, the default storage engine is InnoDB_. This engine is fully
-transactional and supports foreign key references. It's probably the best
-choice at this point. However, note that the InnoDB autoincrement counter
-is lost on a MySQL restart because it does not remember the
-``AUTO_INCREMENT`` value, instead recreating it as "max(id)+1". This may
-result in an inadvertent reuse of :class:`~django.db.models.AutoField` values.
-
-If you upgrade an existing project to MySQL 5.5.5 and subsequently add some
-tables, ensure that your tables are using the same storage engine (i.e. MyISAM
-vs. InnoDB). Specifically, if tables that have a ``ForeignKey`` between them
-use different storage engines, you may see an error like the following when
-running ``migrate``::
-
-    _mysql_exceptions.OperationalError: (
-        1005, "Can't create table '\\db_name\\.#sql-4a8_ab' (errno: 150)"
-    )
+The main drawbacks of MyISAM_ are that it doesn't support transactions or
+enforce foreign-key constraints.
 
 .. _storage engines: https://dev.mysql.com/doc/refman/en/storage-engines.html
 .. _MyISAM: https://dev.mysql.com/doc/refman/en/myisam-storage-engine.html
 .. _InnoDB: https://dev.mysql.com/doc/refman/en/innodb-storage-engine.html
 
-.. [#] Unless this was changed by the packager of your MySQL package. We've
-   had reports that the Windows Community Server installer sets up InnoDB as
-   the default storage engine, for example.
-
 .. _mysql-db-api-drivers:
 
 MySQL DB API Drivers