- 12.1 Data Definition Statements
- 12.1.1 ALTER DATABASE Syntax
- 12.1.2 ALTER FUNCTION Syntax
- 12.1.3 ALTER PROCEDURE Syntax
- 12.1.4 ALTER TABLE Syntax
- 12.1.5 ALTER VIEW Syntax
- 12.1.6 CREATE DATABASE Syntax
- 12.1.7 CREATE FUNCTION Syntax
- 12.1.8 CREATE INDEX Syntax
- 12.1.9 CREATE PROCEDURE and CREATE FUNCTION Syntax
- 12.1.10 CREATE TABLE Syntax
- 12.1.11 CREATE TRIGGER Syntax
- 12.1.12 CREATE VIEW Syntax
- 12.1.13 DROP DATABASE Syntax
- 12.1.14 DROP FUNCTION Syntax
- 12.1.15 DROP INDEX Syntax
- 12.1.16 DROP PROCEDURE and DROP FUNCTION Syntax
- 12.1.17 DROP TABLE Syntax
- 12.1.18 DROP TRIGGER Syntax
- 12.1.19 DROP VIEW Syntax
- 12.1.20 RENAME TABLE Syntax
DROP {PROCEDURE | FUNCTION} [IF EXISTS] sp_name
This statement is used to drop a stored procedure or function.
That is, the specified routine is removed from the server. As of
MySQL 5.0.3, you must have the ALTER
ROUTINE privilege for the routine. (If the
automatic_sp_privileges system variable is
enabled, that privilege and EXECUTE
are granted automatically to the routine creator when the routine
is created and dropped from the creator when the routine is
dropped. See Section 18.2.2, “Stored Routines and MySQL Privileges”.)
The IF EXISTS clause is a MySQL extension. It
prevents an error from occurring if the procedure or function does
not exist. A warning is produced that can be viewed with
SHOW WARNINGS.
Note
DROP PROCEDURE IF EXISTS and DROP
FUNCTION IF EXISTS are not written to the binary log
(and thus not replicated) if the stored procedure or function
named in the DROP statement does not exist on
the master. This is a known issue, which is resolved in MySQL
5.1 and later. (Bug#13684)
DROP FUNCTION is also used to drop
user-defined functions (see Section 12.4.3.2, “DROP FUNCTION Syntax”).
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