fix(django-spanner): restore has_case_insensitive_like, supports_foreign_keys, and supports_aggregate_filter_clause declarations

Author: sakthivelmanii

packages/django-google-spanner/django_spanner/features.py

@@ -38,13 +38,17 @@ def introspected_field_types(self):
     # TIMESTAMP.
     can_introspect_time_field = False
     closed_cursor_error_class = InterfaceError
+    # Spanner uses REGEXP_CONTAINS which is case-sensitive.
+    has_case_insensitive_like = False
     # https://cloud.google.com/spanner/quotas#query_limits
     max_query_params = 900
     # Spanner does not support parameterized defaults in DDL
     requires_literal_defaults = True
 
     if os.environ.get("RUNNING_SPANNER_BACKEND_TESTS") == "1":
         supports_foreign_keys = False
+    else:
+        supports_foreign_keys = True
     can_create_inline_fk = False
     supports_ignore_conflicts = False
     supports_partial_indexes = False
@@ -70,6 +74,7 @@ def introspected_field_types(self):
     supports_subqueries_in_group_by = False
     uses_savepoints = False  # Spanner does not support savepoints.
     can_rollback_tests = False  # Spanner savepoints are no-ops; rely on flush.
+    supports_aggregate_filter_clause = False
     # Spanner does not support expression indexes
     # example: CREATE INDEX index_name ON table (LOWER(column_name))
     supports_expression_indexes = False