SQL CommandsDDL CommandsUser-Defined FunctionALTER FUNCTION本页总览ALTER FUNCTIONSyntaxCREATE FUNCTION <name> AS ([ argname ]) -> '<function_definition>'ExamplesALTER FUNCTION a_plus_3 AS (a) -> a+3;SELECT a_plus_3(2);+---------+| (2 + 3) |+---------+| 5 |+---------+