EC
4108
MariaDBERRORCriticalHIGH confidence

Stored program already exists

Production Risk

Low — The DDL fails but no existing data or program is affected.

Why it happens
  1. 1A CREATE PROCEDURE or CREATE FUNCTION statement was issued for a name that already exists.
  2. 2A deployment script ran twice without checking for existing objects.

Fix 1

Use CREATE OR REPLACE

Use CREATE OR REPLACE
CREATE OR REPLACE PROCEDURE proc_name() BEGIN END;

Why this works

Replaces the existing stored program atomically if it already exists.

Fix 2

Drop before recreating

Drop before recreating
DROP PROCEDURE IF EXISTS proc_name; CREATE PROCEDURE proc_name() BEGIN END;

Why this works

Explicitly drops the old version before creating the new one.

What not to do

✕

Sources
Official documentation ↗

MySQL 8.0 — 4108 ER_SP_ALREADY_EXISTS3

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