9.12.13 Function errors.custom_error_exception(error=None, exception=None)

This method defines custom exceptions for MySQL server errors and returns current customizations.

If error is a MySQL Server error number, you must also pass the exception class. The error argument can be a dictionary, in which case the key is the server error number, and value the class of the exception to be raised.

To reset the customizations, supply an empty dictionary.

import mysql.connector
from mysql.connector import errorcode

# Server error 1028 should raise a DatabaseError
mysql.connector.custom_error_exception(1028, mysql.connector.DatabaseError)

# Or using a dictionary:
mysql.connector.custom_error_exception({
  1028: mysql.connector.DatabaseError,
  1029: mysql.connector.OperationalError,
})

# To reset, pass an empty dictionary:
mysql.connector.custom_error_exception({})