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Troubleshooting MySQL definer issues

This guide explains how to resolve problems that occur when the DEFINER attribute is used with MySQL stored objects, such as views, triggers, functions, and stored procedures.

Problem

Section titled “Problem”

You may encounter errors when trying to view or run stored objects. Examples include:

Error in processing request: No routine with name 'example' found in database 'example_db'. You might be lacking the necessary privileges to edit this routine.

Other symptoms may include random errors during website operation or loss of database functionality.

Cause

Section titled “Cause”

The DEFINER attribute specifies the MySQL user account allowed to access a stored object. Issues arise when:

  • The user in the DEFINER does not match the currently logged-in MySQL user.
  • This is common with cPanel phpMyAdmin, which logs in as the primary account user.
  • It can also occur after site migrations if the DEFINER attributes are not updated to match the new environment.

Resolution

Section titled “Resolution”

Step 1: Log in as the correct database user

Section titled “Step 1: Log in as the correct database user”

To resolve issues, log in using the database user referenced in the DEFINER attributes. You may need to examine the database dump to find the correct user.

Method 1: Use a MySQL client application

Section titled “Method 1: Use a MySQL client application”
  • Tools like MySQL Workbench allow you to log in as the correct database user.
  • This lets you edit and run stored objects with the appropriate privileges.
  • Guide: Using MySQL client applications

Method 2: Use the MySQL command-line program

Section titled “Method 2: Use the MySQL command-line program”

Method 3: Use a custom phpMyAdmin installation

Section titled “Method 3: Use a custom phpMyAdmin installation”

Step 2: Update DEFINER attributes manually (if necessary)

Section titled “Step 2: Update DEFINER attributes manually (if necessary)”

Sometimes it is impossible to log in as the user specified in DEFINER (e.g., after migration). In this case:

  1. Dump the database to a file.
  2. Edit the dump file to replace DEFINER attributes with a user you control.
  3. Import the modified database back into your account.
  4. Test the database to ensure stored objects run correctly.

More Information

Section titled “More Information”

Official MySQL documentation on stored object security:
https://dev.mysql.com/doc/refman/8.0/en/stored-objects-security.html