如何总是从MySQL存储过程返回空结果集？

Question

I want to know How return empty resultset always from MySQL stored procedure, if there is any type error is raise on Procedure during data fetching.

Thanks

Answer 1

Inside your procedure, can use the ERROR HANDLER

CREATE PROCEDURE `procedure_namme`(OUT return_data TEXT)
BEGIN
    DECLARE v_error_code CHAR(5);
    DECLARE v_error_msg TEXT;    
    DECLARE EXIT HANDLER FOR SQLEXCEPTION
         BEGIN
         GET DIAGNOSTICS CONDITION 1
            v_error_code = RETURNED_SQLSTATE,
            v_error_msg = message_text;
            SET return_data = NULL; -- IF ERROR OCCUR THEN ITS SET NULL
            SELECT v_error_code,v_error_msg;
         END
         -- BODY WHAT YOU WANT TO WRITE(LOGIC)

 END;

To know more about it you can refer this one
http://www.mysqltutorial.org/mysql-error-handling-in-stored-procedures/