Available since: v3.0.5
The ALTER FUNCTION statement can be used to modify an existing defined function.
Statement syntax
SurrealQL Syntax
ALTER FUNCTION [ IF EXISTS ] fn::@name
[ ( [ $argument: @type, ... ] ) ] [ -> @type | DROP RETURNS ]
[ { @query ... } ]
[ COMMENT @string | DROP COMMENT ]
[ PERMISSIONS [ NONE | FULL | WHERE @condition ] ] Example usage
-- Declare a function
DEFINE FUNCTION fn::get_message($input: any) {
$input.message
};
-- No `message` field, returns nothing
fn::get_message("wrong input");
-- Tighten up the valid input for the function
ALTER FUNCTION fn::get_message($input: { error_code: 200, message: string } | {error_code: 404, message: string} ) {
$input.message
};
-- Returns an error now
fn::get_message("wrong input");
-- Okay, returns 'Looks good'
fn::get_message({ error_code: 200, message: "Looks good" });