Ways to avoid MySQLdb's “Commands out of sync; you can't run this command now” (2014) exception

Question

Following code, using python 2.6.6 and MySQLdb 1.2.2 causes Commands out of sync; you can\'t run this command now MySQLdb exception:

import MySQLdb
         


        

Answer 1

DB-API tries to handle transactions on its own, starting a transaction on the first command and having its own API call to commit it, so:

cursor.execute( "CREATE TABLE t1 ( t1_id INT PRIMARY KEY AUTO_INCREMENT )" )
cursor.commit()
cursor.execute( "CREATE TABLE t2 ( t2_id INT PRIMARY KEY AUTO_INCREMENT )" )
cursor.commit()

In my opinion, this is a serious, glaring design error of Python's DB-API, making it a serious hassle to execute commands outside of transactions and to have proper control over transactions, eg. to use things like SQLite's BEGIN EXCLUSIVE TRANSACTION. It's as if someone with no real database experience was allowed to design the API...