在 IBM DB2 中創建存儲過程時出現語法錯誤

Question

我無法執行該過程，錯誤指出：

在“ent.payment_id)*0.50”之后發現了意外標記“END-OF-STATEMENT”。 預期的令牌可能包括：“”。 行號=6。 SQLSTATE=42601。

此過程是在代碼有效時更新總價。 我嘗試了兩種方法。 任何人都可以幫忙嗎？

create procedure Prc_Discount(in code char(3), payment_id integer)
begin
 if (code ='abc')then
update payment
set new.total_price =(select total_price from payment
where new.payment_id=payment.payment_id)*0.50;
else
 if (code ='bac')then
update payment
set new.total_price =(select total_price from payment
where new.payment_id=payment.payment_id)*0.75;
else
 if (code ='cba')then
update payment
set new.total_price =(select total_price from payment
where new.payment_id=payment.payment_id)*0.90;
end if;
end@

另一種嘗試：

create procedure Prc_Discount(in code char(3), payment_id integer)
begin
case code
   when abc then                      
      update payment
      set new.total_price =(select total_price from payment
      where new.payment_id=payment.payment_id)*0.50;         
   when acd then                                                     
      update payment
      set new.total_price =(select total_price from payment
      where new.payment_id=payment.payment_id)*0.75; 
   else      
      update payment
      set new.total_price =(select total_price from payment
      where new.payment_id=payment.payment_id)*0.90;         
end case; 
end@

Answer 1

在你的程序中試試這個

update payment f1
set f1.total_price =
        case 
        when code ='abc' then 0.50 * f1.total_price
        when code ='bac' then 0.75 * f1.total_price
        when code ='cba' then 0.90 * f1.total_price
        else f1.total_price
        end
where code in ('abc', 'bac', 'cba') 

Answer 2

嘗試將其放在上面的代碼中：

“——”

用“結束”替換“結束@”；