處理存儲過程中select語句返回的行

Question

有沒有人能告訴我如何獲取行，但在stored procedure內？

比方說，比如我做

BEGIN 
    SELECT id, name, lastname, 
    FROM eyploees; 

    --How can i process all the results within this procedure? 

END<br/> 

Answer 1

你需要使用遊標：

DECLARE id_var INT; 
DECLARE name_var VARCHAR(255); 
DECLARE lastname_var VARCHAR(255); 

DECLARE my_cursor CURSOR FOR SELECT id, name, lastname FROM employees; 

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; 

OPEN my_cursor; 

read_loop: LOOP 

    FETCH my_cursor INTO id_var, name_var, lastname_var; 
    IF done THEN 
     LEAVE read_loop; 
    END IF; 

    --Do some row work here using _var variables from above 

END LOOP; 

CLOSE my_cursor;