Error
Error Code:
1449
MySQL Error 1449: Definer User Not Found
Description
This error indicates that a stored program (such as a view, trigger, stored procedure, or function) references a `DEFINER` user who no longer exists on the MySQL server. It occurs when MySQL attempts to execute or access the stored program but cannot find the user specified in its `DEFINER` clause.
Error Message
The user specified as a definer ('%s'@'%s') does not exist
Known Causes
4 known causesDefiner User Dropped
The user account specified in the stored program's `DEFINER` clause has been permanently removed from the MySQL server.
Hostname Mismatch or Change
The hostname associated with the definer user has been altered, or the stored program was created on a different host where the user exists, but not on the current host.
Database Migration Incomplete
When migrating a database, the associated `DEFINER` user accounts were not transferred or recreated on the new MySQL server.
Definer User Renamed
The user account specified as the definer was renamed, but the stored program's `DEFINER` clause was not updated to reflect the new user name.
Solutions
3 solutions available1. Recreate or Grant Privileges to the Definer User medium
Ensures the user specified in the error message exists and has necessary privileges.
1
Identify the missing definer user and host from the error message. The error message will typically look like: `The user specified as a definer ('user'@'host') does not exist`.
2
Connect to your MySQL server as a user with sufficient privileges (e.g., root).
3
Check if the user actually exists. Replace 'user' and 'host' with the actual values from the error message.
SELECT user, host FROM mysql.user WHERE user = 'user' AND host = 'host';4
If the user does not exist, create it. Replace 'user', 'host', and 'password' with appropriate values.
CREATE USER 'user'@'host' IDENTIFIED BY 'password';5
Grant necessary privileges to the newly created user. The specific privileges depend on what the definer object (e.g., stored procedure, view) requires. For general purposes, you might grant usage and select, insert, update, delete.
GRANT USAGE ON *.* TO 'user'@'host';
GRANT SELECT, INSERT, UPDATE, DELETE ON `database_name`.* TO 'user'@'host';6
Alternatively, if the user exists but lacks privileges, you can grant them without recreating the user.
GRANT USAGE ON *.* TO 'user'@'host';
GRANT SELECT, INSERT, UPDATE, DELETE ON `database_name`.* TO 'user'@'host';7
Flush privileges to ensure changes take effect.
FLUSH PRIVILEGES;2. Modify the Definer of Existing Objects medium
Changes the definer of problematic stored routines or views to an existing user.
1
Identify the stored routine (procedure, function) or view causing the error. You might need to examine the output of `SHOW CREATE PROCEDURE procedure_name;` or `SHOW CREATE VIEW view_name;` to find the definer.
2
Connect to your MySQL server as a user with sufficient privileges (e.g., root).
3
Use the `ALTER DEFINER` statement to change the definer of the object. Replace 'new_user'@'new_host' with an existing user and 'procedure_name' or 'view_name' with the object's name.
ALTER PROCEDURE `database_name`.`procedure_name` DEFINER = 'new_user'@'new_host';
ALTER VIEW `database_name`.`view_name` DEFINER = 'new_user'@'new_host';4
If you have many objects to fix, you might need to query the `information_schema` to find all objects with the problematic definer and then generate `ALTER DEFINER` statements in a script.
SELECT 'ALTER DEFINER = ''new_user''@''new_host''', routine_type, ' ', routine_name, ';' FROM information_schema.routines WHERE definer = '''user''@''host''' AND routine_schema = 'database_name' UNION ALL SELECT 'ALTER DEFINER = ''new_user''@''new_host''', 'VIEW', ' ', table_name, ';' FROM information_schema.views WHERE definer = '''user''@''host''' AND table_schema = 'database_name';5
Execute the generated `ALTER DEFINER` statements.
3. Drop and Recreate the Object medium
Removes the problematic object and recreates it with a valid definer.
1
Identify the object (stored routine, view) that has the missing definer. You might get an error message pointing to a specific object.
2
Connect to your MySQL server as a user with sufficient privileges (e.g., root).
3
Get the `CREATE` statement for the object. Replace 'procedure_name' or 'view_name' and 'database_name'.
SHOW CREATE PROCEDURE `database_name`.`procedure_name`;
SHOW CREATE VIEW `database_name`.`view_name`;4
Save the output of the `SHOW CREATE` statement. This will be used to recreate the object.
5
Drop the object. Replace 'procedure_name' or 'view_name' and 'database_name'.
DROP PROCEDURE `database_name`.`procedure_name`;
DROP VIEW `database_name`.`view_name`;6
Modify the saved `CREATE` statement to explicitly set the `DEFINER` clause to an existing user and host. If you omit the `DEFINER` clause, it will default to the user executing the `CREATE` statement.
CREATE DEFINER=`existing_user`@`existing_host` PROCEDURE `database_name`.`procedure_name` ... ;
CREATE DEFINER=`existing_user`@`existing_host` VIEW `database_name`.`view_name` AS ... ;7
Execute the modified `CREATE` statement to recreate the object.