<p>MySQL Error 1449 occurs when a trigger, view, event, or stored routine is defined with a DEFINER account that no longer exists or cannot be authenticated.</p>
<p>MySQL Error 1449: ER_NO_SUCH_USER arises when an object’s DEFINER user no longer exists. Recreate the missing account or alter the object’s DEFINER to a valid user to resolve the problem.</p>
The user specified as a definer ('%s'@'%s') does not
Error 1449 appears when MySQL cannot find the account listed in a DEFINER clause of a view, trigger, stored procedure, or event. The server halts execution because it cannot verify privileges for a nonexistent user.
The full message reads: The user specified as a definer ('user'@'host') does not exist. MySQL assigns object privileges based on the DEFINER, so a missing account invalidates security checks.
The error often surfaces after database migrations, server restores, or user cleanup scripts that remove accounts still referenced as definers. It also occurs when importing dumps created on another server where definers differ.
Any operation executing the affected object - for example, SELECT on a view or INSERT that fires a trigger - will raise the error immediately.
The primary cause is a dangling DEFINER referencing a user that no longer exists or is defined with a different host component. Version upgrades that discard the mysql.user entry can also trigger the fault.
Mismatched authentication plugins or password expiration can make MySQL treat an existing account as invalid, yielding the same error.
Either recreate the missing user with the correct host and privileges or change the object’s DEFINER to a valid account, commonly root or CURRENT_USER. You can also drop and recreate the object without a DEFINER clause.
After applying the fix, flush privileges and rerun the statement to confirm the error is gone.
Migrated dump files: Use mysqldump --no-definer when exporting or run ALTER statements post-import to update definers.
Deleted service accounts: Recreate them with CREATE USER or switch definers to a shared service user managed through Galaxy’s access-controlled SQL editor.
Standardize object definers to CURRENT_USER to decouple them from specific accounts. Version-control all CREATE statements in Galaxy Collections so team changes are traceable.
Automate CI checks that scan INFORMATION_SCHEMA for invalid definers and alert before deployment.
Error 1227 (42000) access denied often follows if the recreated user lacks required privileges. Grant proper rights to stop the cycle.
Error 1142 (42000) table access denied appears when the definer exists but lacks privileges; GRANT resolves it quickly.
Moving databases between servers often excludes mysql.user entries, leaving objects that point to non-existent accounts.
A user defined as 'app'@'localhost' is different from 'app'@'%'. Changing connection strings without updating definers leads to Error 1449.
Upgrading MySQL can mark older accounts invalid if their authentication plugin is removed, effectively making the user disappear.
Raised when the definer exists but lacks sufficient privileges to run the object.
Indicates the current session user cannot perform the requested operation.
Occurs when a user tries to execute a statement without the necessary privilege.
Yes. Using CURRENT_USER delegates permission checks to the caller, reducing dependency on specific accounts.
Recreating works if you match both user name and host. Mismatched host still triggers the error.
Dropping and recreating the object without a faulty definer eliminates the error but also removes its data or logic, so back up first.
Galaxy tracks object definitions in Collections, making it easy to spot outdated definers before deployment.
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