<p>Error 1539 occurs when a statement references an event that does not exist in the target database.</p>
<p>MySQL Error 1539: ER_EVENT_DOES_NOT_EXIST signals that the referenced event is missing or in a different schema. Verify the event name, qualify it with the correct database, or recreate the event to resolve the issue.</p>
Unknown event '%s'
MySQL throws error 1539 with message Unknown event '%s' when a SQL statement references an event that the Event Scheduler cannot locate in the current database.
The problem surfaces in ALTER EVENT, DROP EVENT, RENAME EVENT, or SHOW CREATE EVENT statements that point to a non existent or incorrectly qualified event.
Because events run on a schedule, keeping them intact is vital for batch jobs, report refreshes, and cleanup routines.
The database searches the mysql.event data dictionary for the supplied event name. If no matching row appears for the active schema, MySQL raises error 1539.
Case sensitivity, schema qualifiers, and user privileges can all influence whether the lookup succeeds.
Start by confirming the event list with SHOW EVENTS FROM db_name. If the event truly exists, qualify it with db_name.event_name in the statement.
If the event is gone, recreate it with CREATE EVENT. Ensure your account has EVENT and ALTER or DROP privileges on the database.
Developers often rename databases between staging and production, leaving event names unchanged. Qualifying the event with the new schema resolves the mismatch.
After a migration, events may be disabled. Use ALTER EVENT db_name.event_name ENABLE to restore them rather than dropping.
Always qualify event names with their schema in scripts. Incorporate SHOW EVENTS checks into deployment pipelines to catch missing objects early.
Use a version controlled tool such as Galaxy to store CREATE EVENT statements so events can be reapplied consistently across environments.
Error 1517: Duplicate event names occur when an event already exists. Use ALTER EVENT instead of CREATE to correct.
Error 1577: Cannot drop EVENT for nonexistent event on the scheduler; verify privileges and schema before dropping.
A single character typo will cause the scheduler lookup to fail, triggering error 1539.
The active schema differs from the one that owns the event, so the lookup returns no rows.
A deployment script removed the event or did not recreate it in the target environment.
The user lacks visibility into mysql.event, making MySQL report the event as missing.
Raised when attempting to create an event that already exists. Use ALTER EVENT instead.
Occurs when DROP EVENT fails due to missing event. Similar root cause to 1539 but on DROP statements.
Generated when the user lacks privileges to view or modify events, sometimes misinterpreted as event not found.
No. Error 1539 is about a missing event, not the scheduler state. Scheduler activation is controlled by SET GLOBAL event_scheduler = ON.
Yes. Use ALTER EVENT db_name.event_name DISABLE to keep the object while stopping execution.
Query the INFORMATION_SCHEMA.EVENTS view or run SHOW EVENTS FROM schema_name.
Events might not be migrated or may live in a different schema. Confirm schema qualifiers in deployment scripts.
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