The RESULT ROW clause in the procedure definition defines the format of a row-producing procedure. The RETURN ROW statement specifies the value returned in each "column" of a result row. The value can be a local variable or parameter of the procedure, or any expression involving constants, local variables, and parameters. The local variables must contain data retrieved in the procedure by a SELECT statement. Multiple result rows must be returned to the caller using the For-loop that retrieves data from a SELECT statement.