Changing and Removing Functions : Function « Procedure Function « MySQL Tutorial

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2.	Select Query
3.	Database
4.	Table
5.	Table Join
6.	Subquery
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8.	Logic Operator
9.	View
10.	Data Types
11.	Procedure Function
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11.3.6.Changing and Removing Functions

MySQL provides an ALTER statement for stored functions.

The ALTER statement can change only the characteristics of a function, not the SQL statements that make up the body.

The ALTER statement has the following syntax:

You can change multiple characteristics within a single ALTER statement.

If a characteristic isn't specified in the statement, the value is left as it was when the function was created.

The DETERMINISTIC characteristic isn't allowed in the ALTER statement.

ALTER FUNCTION [database.] ;

ALTER FUNCTION test.myFunction

  COMMENT 'This is the new comment.';

11.3.Function
	11.3.1.	Creating Functions
	11.3.2.	A function that takes a parameter, performs an operation using an SQL function, and returns the result
	11.3.3.	Single statement function
	11.3.4.	Nested function call
	11.3.5.	Using buildin function in user-defined function
	11.3.6.	Changing and Removing Functions
	11.3.7.	To remove a stored function, use the DROP command
	11.3.8.	Create a procedure for 'READS SQL DATA'
	11.3.9.	ALTER PROCEDURE and ALTER FUNCTION Syntax
	11.3.10.	DROP PROCEDURE and DROP FUNCTION Syntax
	11.3.11.	Function Permissions

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