12.9. Variable Argument Support

Instead of using just an IN parameter, the last non optional parameter can be declared VARIADIC to indicate that it can be repeated 0 or more times when the procedure is called positionally. Section A.7, “Productions”.

CREATE FOREIGN PROCEDURE proc (x integer, VARIADIC z integer) returns (x string);

CREATE FOREIGN PROCEDURE proc (x integer, VARIADIC z integer) returns (x string);