P/L SQL 中 CASE 内的 IF 语句

Posted 2023-03-28

【中文标题】P/L SQL 中 CASE 内的 IF 语句

【英文标题】：IF statement inside the CASE in P/L SQL

【发布时间】：2013-01-06 11:26:27

【问题描述】：

我试图在 CASE 中编写 IF 语句，但这给了我编译错误。这是我的代码的样子

(CASE 
    IF (acc_type_id_ = 'ENDU') THEN
      WHEN PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
      WHEN PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART' 
    ELSE
       WHEN PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
       WHEN PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' THEN '&ACTION_ADD_TO_CART' 
    END IF;   
ELSE '&ACTION_NO_ACTION'
END) ACTION2,

SQLPLUS 中的错误

( begin case declare exit for goto if loop mod null pragma
raise return select update while with <an identifier>
<a double-quoted delimited-identifier> <a bind variable> <<
continue close current delete fetch lock insert open rollback
savepoint set sql execute commit forall merge pipe purge

【问题讨论】：

这是程序的一部分吗？

【参考方案1】：

这个呢？您可以使用acc_type_id_ = 'ENDU' 作为WHEN 条件的一部分来获得相同的结果。

(CASE 
      WHEN acc_type_id_ = 'ENDU' AND PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
      WHEN acc_type_id_ = 'ENDU' AND PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' AND PROD_ITEM_PKG.Get_Allow_Endu_Purch(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART' 
      WHEN acc_type_id_ != 'ENDU' AND PRODUCT_ID !=  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' THEN '&ACTION_ADD_TO_CART'                               
      WHEN acc_type_id_ != 'ENDU' AND PRODUCT_ID =  product_id_ AND AVAIL_TO_SELL = 'YES' AND Enable_Add_To_Cart(PRODUCT_ID)='YES' AND SELL_ONLY_LINKED != 'YES' THEN '&ACTION_ADD_TO_CART' 
      ELSE '&ACTION_NO_ACTION'
END) ACTION2,