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Refs #20483 -- Cached Oracle references retrieval on sql_flush().

This commit is contained in:
Simon Charette 2018-12-25 12:36:03 -05:00 committed by Tim Graham
parent 2b2ae4eeb7
commit ec7bf6d826
1 changed files with 8 additions and 1 deletions
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9
django/db/backends/oracle/operations.py
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@ -1,6 +1,7 @@
import datetime import datetime
import re import re
import uuid import uuid
from functools import lru_cache
from django.conf import settings from django.conf import settings
from django.db.backends.base.operations import BaseDatabaseOperations from django.db.backends.base.operations import BaseDatabaseOperations
@ -315,7 +316,7 @@ END;
def return_insert_id(self): def return_insert_id(self):
return "RETURNING %s INTO %%s", (InsertIdVar(),) 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: with self.connection.cursor() as cursor:
if recursive: if recursive:
cursor.execute(""" cursor.execute("""
@ -348,6 +349,12 @@ END;
""", (table_name,)) """, (table_name,))
return cursor.fetchall() 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): def sql_flush(self, style, tables, sequences, allow_cascade=False):
if tables: if tables:
truncated_tables = {table.upper() for table in tables} truncated_tables = {table.upper() for table in tables}