1578
MariaDBERRORNotableEventsHIGH confidence

Event recursion is forbidden

Production Risk

Low — the nested CREATE/ALTER EVENT is refused.

What this means

An event attempted to create or alter another event, which is forbidden to prevent recursion.

Why it happens
  1. 1An event body contains a CREATE EVENT or ALTER EVENT statement.
How to reproduce
trigger — this will error
trigger — this will error
-- Inside an event:
CREATE EVENT nested_event ON SCHEDULE EVERY 1 HOUR DO SELECT 1;

expected output

ERROR 1578 (HY000): Recursion of EVENT DDL statements is forbidden when body is present

Fix

Move event management outside of events

Move event management outside of events
-- Create/alter events from application code or scheduled jobs, not from within other events.

Why this works

MySQL prohibits recursive event DDL to prevent infinite scheduling chains.

What not to do

✕

Sources
Official documentation ↗

MySQL 8.0 — 1578 ER_EVENT_RECURSION_FORBIDDEN

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