MySQL 1188: Statement failed due to trigger.

When encountering the error "1188: Statement failed due to trigger" in MySQL, here's a direct action plan:

  1. Identify the failing statement and the associated table. If not already known, review the application logs or use the MySQL general log to identify the query.



  1. List all triggers associated with the table involved. Use the following SQL command:



SHOW TRIGGERS WHERE `Table` = 'yourtablename';

Replace 'yourtablename' with the name of the table involved in the error.

  1. Review the code of each trigger listed in step 2 to identify potential causes of the failure. Use the following command to view the trigger code:



SHOW CREATE TRIGGER trigger_name;

Replace 'trigger_name' with the name of the trigger you are investigating.

  1. Check for common issues in the trigger code, such as:


- Data manipulation that violates constraints (e.g., UNIQUE, FOREIGN KEY).
- Commands not allowed in triggers (e.g., explicit transaction control statements like COMMIT).
- Infinite recursion or loops due to triggers calling other triggers or themselves indirectly.

  1. Temporarily disable the trigger to confirm it is the cause of the error. Use:



RENAME TABLE yourtablename TO yourtablename_tmp;
CREATE TABLE yourtablename LIKE yourtablename_tmp;

Caution: This will drop all triggers associated with the table. Ensure this is acceptable before proceeding or consider creating a test environment to perform these actions.

  1. If the issue is resolved by disabling the trigger, re-enable it (if necessary) and fix the problematic part of the trigger's code. Then, recreate the trigger with the corrected code.



  1. If the problem persists or if disabling the trigger is not an option, consider reviewing any recent changes to the database schema or trigger definitions that might have introduced the issue.



Performing these steps should help identify and potentially resolve the "1188: Statement failed due to trigger" error in a MySQL database.

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