Declare unimplemented features
@@ -53,9 +53,14 @@ class DatabaseFeatures(BaseDatabaseFeatures):
# setting for Oracle, while Salesforce saves nulls as empty strings not vice
# versa.
+ supports_partial_indexes = False # Django 2.2+
+ supports_table_check_constraints = False
+
can_introspect_json_field = False # Django 3.1+
+ supports_deferrable_unique_constraints = False
supports_collation_on_charfield = False # Django 3.2+
supports_collation_on_textfield = False
supports_non_deterministic_collations = False
+ supports_covering_indexes = False
supports_expression_indexes = False
