% confuses python raw sql query
- by Jonathan
Following this SO question, I'm trying to "truncate" all tables related to a certain django application using the following raw sql commands in python:
cursor.execute("set foreign_key_checks = 0")
cursor.execute("select concat('truncate table ',table_schema,'.',table_name,';') as sql_stmt from information_schema.tables where table_schema = 'my_db' and table_type = 'base table' AND table_name LIKE 'some_prefix%'")
for sql in [sql[0] for sql in cursor.fetchall()]:
cursor.execute(sql)
cursor.execute("set foreign_key_checks = 1")
Alas I receive the following error:
C:\dev\my_project>my_script.py
Traceback (most recent call last):
File "C:\dev\my_project\my_script.py", line 295, in <module>
cursor.execute(r"select concat('truncate table ',table_schema,'.',table_name,';') as sql_stmt from information_schema.tables where table_schema = 'my_db' and table_type = 'base table' AND table_name LIKE 'some_prefix%'")
File "C:\Python26\lib\site-packages\django\db\backends\util.py", line 18, in execute
sql = self.db.ops.last_executed_query(self.cursor, sql, params)
File "C:\Python26\lib\site-packages\django\db\backends\__init__.py", line 216, in last_executed_query
return smart_unicode(sql) % u_params
TypeError: not enough arguments for format string
Is the % in the LIKE making trouble? How can I workaround it?
