[1.7.x] Fixed #23537 -- Added Oracle GIS SchemaEditor.

Thanks Shai Berger for review.

Backport of a8f07530a7 from master

5 files changed, 117 insertions, 8 deletions

diff --git a/django/contrib/gis/db/backends/oracle/base.py b/django/contrib/gis/db/backends/oracle/base.py
index 701a9312b3..afa7ceee1e 100644
--- a/django/contrib/gis/db/backends/oracle/base.py
+++ b/django/contrib/gis/db/backends/oracle/base.py
@@ -2,6 +2,7 @@ from django.db.backends.oracle.base import DatabaseWrapper as OracleDatabaseWrap
 from django.contrib.gis.db.backends.oracle.creation import OracleCreation
 from django.contrib.gis.db.backends.oracle.introspection import OracleIntrospection
 from django.contrib.gis.db.backends.oracle.operations import OracleOperations
+from django.contrib.gis.db.backends.oracle.schema import OracleGISSchemaEditor
 
 
 class DatabaseWrapper(OracleDatabaseWrapper):
@@ -10,3 +11,6 @@ class DatabaseWrapper(OracleDatabaseWrapper):
         self.ops = OracleOperations(self)
         self.creation = OracleCreation(self)
         self.introspection = OracleIntrospection(self)
+
+    def schema_editor(self, *args, **kwargs):
+        return OracleGISSchemaEditor(self, *args, **kwargs)
diff --git a/django/contrib/gis/db/backends/oracle/operations.py b/django/contrib/gis/db/backends/oracle/operations.py
index 3af78929f8..5cffe21a17 100644
--- a/django/contrib/gis/db/backends/oracle/operations.py
+++ b/django/contrib/gis/db/backends/oracle/operations.py
@@ -142,6 +142,9 @@ class OracleOperations(DatabaseOperations, BaseSpatialOperations):
 
     truncate_params = {'relate': None}
 
+    def geo_quote_name(self, name):
+        return super(OracleOperations, self).geo_quote_name(name).upper()
+
     def convert_extent(self, clob):
         if clob:
             # Generally, Oracle returns a polygon for the extent -- however,
diff --git a/django/contrib/gis/db/backends/oracle/schema.py b/django/contrib/gis/db/backends/oracle/schema.py
new file mode 100644
index 0000000000..973a56e766
--- /dev/null
+++ b/django/contrib/gis/db/backends/oracle/schema.py
@@ -0,0 +1,94 @@
+from django.contrib.gis.db.models.fields import GeometryField
+from django.db.backends.oracle.schema import DatabaseSchemaEditor
+from django.db.backends.utils import truncate_name
+
+
+class OracleGISSchemaEditor(DatabaseSchemaEditor):
+    sql_add_geometry_metadata = ("""
+        INSERT INTO USER_SDO_GEOM_METADATA
+            ("TABLE_NAME", "COLUMN_NAME", "DIMINFO", "SRID")
+        VALUES (
+            %(table)s,
+            %(column)s,
+            MDSYS.SDO_DIM_ARRAY(
+                MDSYS.SDO_DIM_ELEMENT('LONG', %(dim0)s, %(dim2)s, %(tolerance)s),
+                MDSYS.SDO_DIM_ELEMENT('LAT', %(dim1)s, %(dim3)s, %(tolerance)s)
+            ),
+            %(srid)s
+        )""")
+    sql_add_spatial_index = 'CREATE INDEX %(index)s ON %(table)s(%(column)s) INDEXTYPE IS MDSYS.SPATIAL_INDEX'
+    sql_drop_spatial_index = 'DROP INDEX %(index)s'
+    sql_clear_geometry_table_metadata = 'DELETE FROM USER_SDO_GEOM_METADATA WHERE TABLE_NAME = %(table)s'
+    sql_clear_geometry_field_metadata = (
+        'DELETE FROM USER_SDO_GEOM_METADATA WHERE TABLE_NAME = %(table)s '
+        'AND COLUMN_NAME = %(column)s'
+    )
+
+    def __init__(self, *args, **kwargs):
+        super(OracleGISSchemaEditor, self).__init__(*args, **kwargs)
+        self.geometry_sql = []
+
+    def geo_quote_name(self, name):
+        return self.connection.ops.geo_quote_name(name)
+
+    def column_sql(self, model, field, include_default=False):
+        column_sql = super(OracleGISSchemaEditor, self).column_sql(model, field, include_default)
+        if isinstance(field, GeometryField):
+            db_table = model._meta.db_table
+            self.geometry_sql.append(
+                self.sql_add_geometry_metadata % {
+                    'table': self.geo_quote_name(db_table),
+                    'column': self.geo_quote_name(field.column),
+                    'dim0': field._extent[0],
+                    'dim1': field._extent[1],
+                    'dim2': field._extent[2],
+                    'dim3': field._extent[3],
+                    'tolerance': field._tolerance,
+                    'srid': field.srid,
+                }
+            )
+            if field.spatial_index:
+                self.geometry_sql.append(
+                    self.sql_add_spatial_index % {
+                        'index': self.quote_name(self._create_spatial_index_name(model, field)),
+                        'table': self.quote_name(db_table),
+                        'column': self.quote_name(field.column),
+                    }
+                )
+        return column_sql
+
+    def create_model(self, model):
+        super(OracleGISSchemaEditor, self).create_model(model)
+        self.run_geometry_sql()
+
+    def delete_model(self, model):
+        super(OracleGISSchemaEditor, self).delete_model(model)
+        self.execute(self.sql_clear_geometry_table_metadata % {
+            'table': self.geo_quote_name(model._meta.db_table),
+        })
+
+    def add_field(self, model, field):
+        super(OracleGISSchemaEditor, self).add_field(model, field)
+        self.run_geometry_sql()
+
+    def remove_field(self, model, field):
+        if isinstance(field, GeometryField):
+            self.execute(self.sql_clear_geometry_field_metadata % {
+                'table': self.geo_quote_name(model._meta.db_table),
+                'column': self.geo_quote_name(field.column),
+            })
+            if field.spatial_index:
+                self.execute(self.sql_drop_spatial_index % {
+                    'index': self.quote_name(self._create_spatial_index_name(model, field)),
+                })
+        super(OracleGISSchemaEditor, self).remove_field(model, field)
+
+    def run_geometry_sql(self):
+        for sql in self.geometry_sql:
+            self.execute(sql)
+        self.geometry_sql = []
+
+    def _create_spatial_index_name(self, model, field):
+        # Oracle doesn't allow object names > 30 characters. Use this scheme
+        # instead of self._create_index_name() for backwards compatibility.
+        return truncate_name('%s_%s_id' % (model._meta.db_table, field.column), 30)
diff --git a/django/contrib/gis/tests/gis_migrations/test_operations.py b/django/contrib/gis/tests/gis_migrations/test_operations.py
index 6fd1e54ace..92abf99b90 100644
--- a/django/contrib/gis/tests/gis_migrations/test_operations.py
+++ b/django/contrib/gis/tests/gis_migrations/test_operations.py
@@ -53,6 +53,17 @@ class OperationTests(TransactionTestCase):
         )]
         return self.apply_operations('gis', ProjectState(), operations)
 
+    def assertGeometryColumnsCount(self, expected_count):
+        table_name = "gis_neighborhood"
+        if connection.features.uppercases_column_names:
+            table_name = table_name.upper()
+        self.assertEqual(
+            GeometryColumns.objects.filter(**{
+                GeometryColumns.table_name_col(): table_name,
+            }).count(),
+            expected_count
+        )
+
     def test_add_gis_field(self):
         """
         Tests the AddField operation with a GIS-enabled column.
@@ -72,10 +83,7 @@ class OperationTests(TransactionTestCase):
 
         # Test GeometryColumns when available
         if HAS_GEOMETRY_COLUMNS:
-            self.assertEqual(
-                GeometryColumns.objects.filter(**{GeometryColumns.table_name_col(): "gis_neighborhood"}).count(),
-                2
-            )
+            self.assertGeometryColumnsCount(2)
 
         if self.has_spatial_indexes:
             with connection.cursor() as cursor:
@@ -97,10 +105,7 @@ class OperationTests(TransactionTestCase):
 
         # Test GeometryColumns when available
         if HAS_GEOMETRY_COLUMNS:
-            self.assertEqual(
-                GeometryColumns.objects.filter(**{GeometryColumns.table_name_col(): "gis_neighborhood"}).count(),
-                0
-            )
+            self.assertGeometryColumnsCount(0)
 
     def test_create_model_spatial_index(self):
         self.current_state = self.set_up_test_model()
diff --git a/docs/releases/1.7.1.txt b/docs/releases/1.7.1.txt
index 3b53534185..a1149d37cd 100644
--- a/docs/releases/1.7.1.txt
+++ b/docs/releases/1.7.1.txt
@@ -77,6 +77,9 @@ Bugfixes
 * Added ``SchemaEditor`` for MySQL GIS backend so that spatial indexes will be
   created for apps with migrations (:ticket:`23538`).
 
+* Added ``SchemaEditor`` for Oracle GIS backend so that spatial metadata and
+  indexes will be created for apps with migrations (:ticket:`23537`).
+
 * Coerced the ``related_name`` model field option to unicode during migration
   generation to generate migrations that work with both Python 2 and 3
   (:ticket:`23455`).