EC
1470
MySQLERRORNotableStored RoutinesHIGH confidence

Failed to DROP stored procedure

Production Risk

Low — administrative error; retry the operation.

What this means

ER_SP_DROP_FAILED (1470, SQLSTATE HY000) is raised when MySQL fails to drop a stored procedure, typically due to internal storage errors or concurrent access issues.

Why it happens
  1. 1Concurrent modification of mysql.proc (pre-8.0)
  2. 2Disk I/O error while removing the routine from storage
  3. 3Corruption in the mysql schema tables
How to reproduce
trigger — this will error
trigger — this will error
DROP PROCEDURE my_proc;
-- Returns error if internal drop fails

expected output

ERROR 1470 (HY000): Failed to DROP PROCEDURE my_proc

Fix

Retry the DROP or check for table corruption

Retry the DROP or check for table corruption
-- Check mysql.proc table health (pre-8.0):
CHECK TABLE mysql.proc;
REPAIR TABLE mysql.proc;

-- Retry the drop:
DROP PROCEDURE IF EXISTS my_proc;

Why this works

Repairing the mysql.proc table or retrying the operation usually resolves transient failures.

Version notes
MySQL 8.0

Routine metadata is stored in the data dictionary, not mysql.proc.

Sources
Official documentation ↗

MySQL 8.0 — 1470 ER_SP_DROP_FAILED

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