How to Fix the \'Commands Out of Sync\' Error When Using Python and MySQL Stored Procedures?

Python MySQL: Resolving "Commands Out of Sync" Error When Executing Stored Procedures

In Python programming, when utilizing Django to execute stored procedures within a MySQL database, some users encounter the "commands out of sync; you can't run this command now" error upon attempting to execute subsequent statements after calling a procedure.

This error typically arises when attempting to execute a non-select statement (e.g., an update or delete operation) following the procedure call without performing a commitment action.

Consider the following code example:

cursor.callproc('my_mysql_procedure', [some_id,])
result = cursor.fetchall()
for r in result:
    do something

cursor.execute("select * from some_table")
result = cursor.fetchall()

After executing the stored procedure, the connection becomes "out of sync" if non-select operations are attempted without first closing and re-opening the cursor.

To resolve this issue, it's recommended to close the cursor immediately after retrieving the results from the stored procedure:

cursor.close()

cursor = connection.cursor()

Re-opening a new cursor ensures that the connection is reset and synchronized correctly, allowing subsequent statements to execute as intended. It's important to note that the result set obtained from the procedure call remains accessible after closing the cursor.

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