mySQL觸發第二張表

Question

請幫助這個MySQL觸發器 - 已經搜索並找不到語法問題。

錯誤＃1064 - 您的SQL語法錯誤;檢查與您的MySQL服務器版本相對應的手冊，以在'@v_index int DEFAULT 1; WHILE @v_index < = NEW.pt_number INSERT INTO專利」在行9

DELIMITER $$ 

CREATE TRIGGER after_insert_calls_insert_patients 

AFTER INSERT ON Calls 

FOR EACH ROW 

    BEGIN 

    DECLARE @v_index int DEFAULT 1; 

    WHILE @v_index <= NEW.pt_number 

     INSERT INTO Patients SET 

     Patient_id = CONCAT(NEW.Calls_id, '-', @v_index), 
     FK_Calls_id = NEW.Calls_id, 
     update_by = "SYSTEM"; 

     SET @v_index := @v_index +1; 

     END WHILE; 

END; 
$$ 

DELIMITER ; 

Answer 1

嘗試放置在@ 「DECLARE @v_index INT DEFAULT 1;」