1, the function defines each indicators in the table



2, the stored procedure need statistical data: every index of the
DECLARE v_label_code VARCHAR (50);
DECLARE v_label_value VARCHAR (125);
DECLARE v_calc_function VARCHAR (125);
DECLARE v_func_param VARCHAR (50);
DECLARE over INT the DEFAULT FALSE;
DECLARE feature_cursor CURSOR FOR the SELECT label_code calc_function, func_param FROM feature_define WHERE status=1 and Id=1;

DECLARE the CONTINUE HANDLER FOR the NOT FOUND SET over=TRUE;

The OPEN feature_cursor;
Loop_1: LOOP
The FETCH feature_cursor INTO v_label_code, v_calc_function v_func_param;
IF over THEN
LEAVE loop_1;
END
IF;

SELECT CONCAT (v_calc_function, '(', v_func_param,') ') INTO v_label_value;

The SELECT v_label_code;
The SELECT v_label_value;
END
LOOP
Loop_1;
The CLOSE feature_cursor;

3, the actual call results returned is a string, rather than a function call


Can you tell me how to solve?