EC
1546
MySQLERRORNotableEventsHIGH confidence

Unknown event

Production Risk

Low — administrative error; no data is affected.

What this means

ER_EVENT_DOES_NOT_EXIST (1546, SQLSTATE HY000) is raised when ALTER EVENT or DROP EVENT references an event that does not exist.

Why it happens
  1. 1Typo in the event name in ALTER EVENT or DROP EVENT
  2. 2The event was already dropped or was never created
  3. 3Operating in the wrong database schema
How to reproduce
trigger — this will error
trigger — this will error
DROP EVENT nonexistent_event;

expected output

ERROR 1546 (HY000): Unknown event 'nonexistent_event'

Fix

Use IF EXISTS to avoid errors, or verify the event name

Use IF EXISTS to avoid errors, or verify the event name
-- Safe drop:
DROP EVENT IF EXISTS nonexistent_event;

-- List events in the current schema:
SHOW EVENTS;

Why this works

IF EXISTS prevents errors when the event may or may not exist.

Sources
Official documentation ↗

MySQL 8.0 — 1546 ER_EVENT_DOES_NOT_EXIST

Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev

← All MySQL errors