SQL CommandsDDL CommandsUser-Defined FunctionDROP FUNCTIONOn this pageDROP FUNCTIONDrops a user-defined function.SyntaxDROP FUNCTION [IF EXISTS] <function_name>ExamplesDROP FUNCTION a_plus_3;SELECT a_plus_3(2);ERROR 1105 (HY000): Code: 2602, Text = Unknown Function a_plus_3 (while in analyze select projection).