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-rw-r--r--django/contrib/gis/db/backends/base/features.py3
-rw-r--r--django/contrib/gis/db/backends/oracle/features.py1
2 files changed, 4 insertions, 0 deletions
diff --git a/django/contrib/gis/db/backends/base/features.py b/django/contrib/gis/db/backends/base/features.py
index 4fd4fd18a7..779ff23689 100644
--- a/django/contrib/gis/db/backends/base/features.py
+++ b/django/contrib/gis/db/backends/base/features.py
@@ -40,6 +40,9 @@ class BaseSpatialFeatures(object):
# Does the database have raster support?
supports_raster = False
+ # Does the database support a unique index on geometry fields?
+ supports_geometry_field_unique_index = True
+
@property
def supports_bbcontains_lookup(self):
return 'bbcontains' in self.connection.ops.gis_operators
diff --git a/django/contrib/gis/db/backends/oracle/features.py b/django/contrib/gis/db/backends/oracle/features.py
index df0aedcf32..b0b7e27df8 100644
--- a/django/contrib/gis/db/backends/oracle/features.py
+++ b/django/contrib/gis/db/backends/oracle/features.py
@@ -6,3 +6,4 @@ from django.db.backends.oracle.features import \
class DatabaseFeatures(BaseSpatialFeatures, OracleDatabaseFeatures):
supports_add_srs_entry = False
supports_geometry_field_introspection = False
+ supports_geometry_field_unique_index = False