<p>MySQL cannot delete the requested event from the mysql.event system table, usually because of missing privileges, running schedulers, or metadata corruption.</p>
<p>MySQL Error 1549: ER_EVENT_CANNOT_DELETE appears when DROP EVENT fails to remove an event record from mysql.event. Check SUPER privileges, stop the Event Scheduler, and delete or repair the row, then run DROP EVENT again to resolve the issue.</p>
Failed to delete the event from mysql.event
The server tried to execute DROP EVENT or an implicit event drop while removing a database. It attempted to delete the event metadata row in the mysql.event system table and failed, so MySQL raised Error 1549 (ER_EVENT_CANNOT_DELETE).
The error stops the statement and leaves the event definition intact. Applications that rely on recreating events will fail until the metadata issue is fixed.
Missing DELETE or SUPER privilege on the mysql.event table is the most common trigger. The Event Scheduler may also have the event locked, preventing deletion. Finally, metadata corruption in mysql.event can block removal.
Verify the user has DROP and EVENT privileges plus SUPER if needed. Temporarily disable the Event Scheduler, then drop the event again. If corruption exists, back up mysql.event, delete the row manually, and run mysql_upgrade to rebuild metadata.
When dropping a schema that contains events, MySQL cascades DROP EVENT. If a non-SUPER user executes DROP DATABASE, the implicit DROP EVENT can trigger Error 1549. Grant SUPER or drop the events first.
On replication replicas with read_only enabled, DROP EVENT fails because the statement requires updates to mysql.event. Temporarily disable read_only or run the change on the primary.
Always grant EVENT privilege and, when manipulating system tables, use a dedicated DBA account with SUPER. Keep the Event Scheduler disabled during maintenance windows and run mysqlcheck --repair on mysql system tables after crashes.
Galaxy’s AI copilot warns when a DROP EVENT statement might fail due to insufficient privileges. The editor highlights the needed SUPER permission and suggests a safe, permission-aware migration script to prevent Error 1549.
The executing account lacks SUPER or DELETE access on mysql.event, so MySQL blocks the metadata update.
The global Event Scheduler thread is processing the event, creating a metadata lock that prevents deletion.
read_only or super_read_only is ON, disallowing writes to system tables including mysql.event.
Unexpected shutdowns or disk errors can corrupt the table, stopping DELETE operations.
Statement-based replication filters may block the DROP EVENT on replicas, causing mismatch and error replays.
Raised when MySQL cannot insert or update an event in mysql.event during CREATE or ALTER EVENT.
Occurs if an ALTER EVENT schedules a first execution time in the past.
General error for read_only servers, often seen when DROP EVENT runs on a replica.
Lack of database privileges can surface if DROP EVENT is attempted by an unauthorized user.
No, it only blocks deletion of the event metadata. Regular table data remains untouched.
Yes, but do so with a full backup and run mysql_upgrade afterward to refresh caches.
Yes, all scheduled events pause. Schedule maintenance during low-traffic periods or disable per-session on MySQL 8.0.29+.
Galaxy’s permission checker shows required rights before executing DROP EVENT, and the collaboration audit trail flags unsuccessful attempts for quick review.
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