Refs -- Cached Oracle references retrieval on sql_flush().
import datetime
import re
import uuid
+from functools import lru_cache
from django.conf import settings
from django.db.backends.base.operations import BaseDatabaseOperations
@@ -315,7 +316,7 @@ END;
def return_insert_id(self):
return "RETURNING %s INTO %%s", (InsertIdVar(),)
- def _foreign_key_constraints(self, table_name, recursive=False):
+ def __foreign_key_constraints(self, table_name, recursive):
with self.connection.cursor() as cursor:
if recursive:
cursor.execute("""
@@ -348,6 +349,12 @@ END;
""", (table_name,))
return cursor.fetchall()
+ @cached_property
+ def _foreign_key_constraints(self):
+ # 512 is large enough to fit the ~330 tables (as of this writing) in
+ # Django's test suite.
+ return lru_cache(maxsize=512)(self.__foreign_key_constraints)
+
def sql_flush(self, style, tables, sequences, allow_cascade=False):
if tables:
truncated_tables = {table.upper() for table in tables}
