Fixed #27788 -- Dropped support for Oracle < 12.1.

django/contrib/gis/db/backends/oracle/operations.py

@@ -17,7 +17,6 @@ from django.contrib.gis.db.models import aggregates
 from django.contrib.gis.geometry.backend import Geometry
 from django.contrib.gis.measure import Distance
 from django.db.backends.oracle.operations import DatabaseOperations
-from django.utils.functional import cached_property
 
 DEFAULT_TOLERANCE = '0.05'
 
@@ -132,15 +131,10 @@ class OracleOperations(BaseSpatialOperations, DatabaseOperations):
 
     truncate_params = {'relate': None}
 
-    @cached_property
-    def unsupported_functions(self):
-        unsupported = {
+    unsupported_functions = {
         'AsGeoJSON', 'AsKML', 'AsSVG', 'Envelope', 'ForceRHR', 'GeoHash',
         'MakeValid', 'MemSize', 'Scale', 'SnapToGrid', 'Translate',
     }
-        if self.connection.oracle_full_version < '12.1.0.2':
-            unsupported.add('BoundingCircle')
-        return unsupported
 
     def geo_quote_name(self, name):
         return super().geo_quote_name(name).upper()

django/db/backends/base/features.py

@@ -253,18 +253,15 @@ class BaseDatabaseFeatures:
         except NotImplementedError:
             return False
 
-    def introspected_boolean_field_type(self, field=None, created_separately=False):
+    def introspected_boolean_field_type(self, field=None):
         """
         What is the type returned when the backend introspects a BooleanField?
-        The optional arguments may be used to give further details of the field to be
-        introspected; in particular, they are provided by Django's test suite:
-        field -- the field definition
-        created_separately -- True if the field was added via a SchemaEditor's AddField,
-                              False if the field was created with the model
-
-        Note that return value from this function is compared by tests against actual
-        introspection results; it should provide expectations, not run an introspection
-        itself.
+        The `field` argument may be used to give further details of the field
+        to be introspected.
+
+        The return value from this function is compared by tests against actual
+        introspection results; it should provide expectations, not run an
+        introspection itself.
         """
         if self.can_introspect_null and field and field.null:
             return 'NullBooleanField'

django/db/backends/oracle/features.py

@@ -35,18 +35,3 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     # Oracle doesn't ignore quoted identifiers case but the current backend
     # does by uppercasing all identifiers.
     ignores_table_name_case = True
-
-    def introspected_boolean_field_type(self, field=None, created_separately=False):
-        """
-        Some versions of Oracle -- we've seen this on 11.2.0.1 and suspect
-        it goes back -- have a weird bug where, when an integer column is
-        added to an existing table with a default, its precision is later
-        reported on introspection as 0, regardless of the real precision.
-        For Django introspection, this means that such columns are reported
-        as IntegerField even if they are really BigIntegerField or BooleanField.
-
-        The bug is solved in Oracle 11.2.0.2 and up.
-        """
-        if self.connection.oracle_full_version < '11.2.0.2' and field and field.has_default() and created_separately:
-            return 'IntegerField'
-        return super().introspected_boolean_field_type(field, created_separately)

docs/ref/contrib/gis/db-api.txt

@@ -376,7 +376,7 @@ Function                              PostGIS  Oracle          MySQL        Spat
 :class:`AsGML`                        X        X                            X
 :class:`AsKML`                        X                                     X
 :class:`AsSVG`                        X                                     X
-:class:`BoundingCircle`               X        X (≥ 12.1.0.2)
+: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

docs/ref/contrib/gis/functions.txt

@@ -170,7 +170,7 @@ __ http://www.w3.org/Graphics/SVG/
 .. class:: BoundingCircle(expression, num_seg=48, **extra)
 
 *Availability*: `PostGIS <http://postgis.net/docs/ST_MinimumBoundingCircle.html>`__,
-`Oracle (≥ 12.1.0.2) <https://docs.oracle.com/database/121/SPATL/GUID-82A61626-BB64-4793-B53D-A0DBEC91831A.htm#SPATL1554>`_
+`Oracle <https://docs.oracle.com/database/121/SPATL/GUID-82A61626-BB64-4793-B53D-A0DBEC91831A.htm#SPATL1554>`_
 
 Accepts a single geographic field or expression and returns the smallest circle
 polygon that can fully contain the geometry.

docs/ref/databases.txt

@@ -676,7 +676,7 @@ rather than a list. SQLite does not support this.
 Oracle notes
 ============
 
-Django supports `Oracle Database Server`_ versions 11.2 and higher. Version
+Django supports `Oracle Database Server`_ versions 12.1 and higher. Version
 5.2 or higher of the `cx_Oracle`_ Python driver is required.
 
 .. _`Oracle Database Server`: http://www.oracle.com/

docs/releases/2.0.txt

@@ -210,6 +210,13 @@ Database backend API
 
 * ...
 
+Dropped support for Oracle 11.2
+-------------------------------
+
+The end of upstream support for Oracle 11.2 is Dec. 2020. Django 1.11 will be
+supported until April 2020 which almost reaches this date. Django 2.0
+officially supports Oracle 12.1+.
+
 Miscellaneous
 -------------
 

tests/gis_tests/geoapp/test_functions.py

@@ -305,10 +305,8 @@ class GISFunctionsTests(TestCase):
         for c in mpoly_qs:
             self.assertEqual(c.mpoly.num_points, c.num_points)
 
-        if not oracle:
-            # Oracle cannot count vertices in Point geometries.
         for c in City.objects.annotate(num_points=functions.NumPoints('point')):
-                self.assertEqual(1, c.num_points)
+            self.assertEqual(c.num_points, 1)
 
     @skipUnlessDBFeature("has_PointOnSurface_function")
     def test_point_on_surface(self):

tests/schema/tests.py

@@ -416,7 +416,7 @@ class SchemaTests(TransactionTestCase):
         field_type = columns['awesome'][0]
         self.assertEqual(
             field_type,
-            connection.features.introspected_boolean_field_type(new_field, created_separately=True)
+            connection.features.introspected_boolean_field_type(new_field)
         )
 
     def test_add_field_default_transform(self):