# Troubleshooting MySQL definer issues

> Fix errors with MySQL views, triggers and stored procedures caused by the DEFINER attribute, by using the right user or updating definers.

Source: https://helpcenter.ruachost.com/developers/databases/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**

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**

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**

### **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**

- 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](https://chatgpt.com/c/69247fae-8a34-8331-871f-db5b6eb0c46a#)

### **Method 2: Use the MySQL command-line program**

- Log in using the `mysql` CLI as the correct database user.
- You can then edit and run stored objects.
- [Guide: Using the mysql command-line program](https://chatgpt.com/c/69247fae-8a34-8331-871f-db5b6eb0c46a#)

### **Method 3: Use a custom phpMyAdmin installation**

- Install a standalone phpMyAdmin on your hosting account.
- This allows logging in as the correct database user instead of the cPanel primary user.
- [Guide: Creating a custom phpMyAdmin installation](https://chatgpt.com/c/69247fae-8a34-8331-871f-db5b6eb0c46a#)

### **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**

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