MySQL Reference Manual for version 4.0.18.

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21.2 Adding New Functions to MySQL

There are two ways to add new functions to MySQL:

Each method has advantages and disadvantages:

Whichever method you use to add new functions, they may be used just like native functions such as ABS() or SOUNDEX().

21.2.1 CREATE FUNCTION/DROP FUNCTION Syntax  
21.2.2 Adding a New User-defined Function  
21.2.3 Adding a New Native Function  



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