EC
1591
MySQLERRORNotableEventsHIGH confidence

Event body compilation error

Production Risk

Medium — the event will not execute until its body is fixed.

What this means

The body of an event failed to compile when the event was loaded from the mysql.event table.

Why it happens
  1. 1The event body contains invalid SQL that was not caught at creation time.
  2. 2The event references objects that no longer exist.
  3. 3Schema changes rendered the event body invalid.
How to reproduce
trigger — this will error
trigger — this will error
-- An event created with:
CREATE EVENT ev ON SCHEDULE EVERY 1 HOUR DO
  UPDATE nonexistent_table SET val = 1;

expected output

ERROR 1591 (HY000): Event scheduler: [root@localhost][db.ev] event compile error

Fix

Recreate the event with valid SQL

Recreate the event with valid SQL
DROP EVENT ev;
CREATE EVENT ev
  ON SCHEDULE EVERY 1 HOUR
  DO UPDATE existing_table SET val = 1;

Why this works

Replace the event with one whose body refers only to existing, valid objects.

Sources
Official documentation ↗

MySQL 8.0 — 1591 ER_EVENT_COMPILE_ERROR

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