Question

我正在编写一个过程，其中我有sql语句，它将使用TEMP_WF_WORKFLOW语句在CASE WHEN表中插入值。条件是STATUS_ID为0时EVENT_ID=10003，STATUS_ID为1时为EVETN_ID=10018。当我尝试使用CASE WHEN时，它给我错误关键字。我不知道但是如果不使用CASE WHEN语句，还有其他方法可以做到这一点。我正在考虑使用cursor，但不知道如何做到这一点。

这是我的问题：

CREATE OR REPLACE PROCEDURE ext_self_10003_sigwf AS BEGIN       
    -- first empty TEMP_WF_WORKFLOW table
    EXECUTE IMMEDIATE 'TRUNCATE TABLE TEMP_WF_WORKFLOW';

    -- get WF_WORKFLOW table data 
    INSERT INTO temp_wf_workflow (status_id, event_id, order_number)
      SELECT
        wf.status_id,
        CASE WHEN wf.status_id = 0 THEN event_id = 10003
        WHEN wf.status_id = 1 THEN event_id = 10018 END AS eventid,
        tsm.order_number 
       FROM wf_workflow@fonic_retail wf
        JOIN tmp_soap_monitoring_ids tsm ON tsm.subscription_id = wf.subscription_id
       WHERE tsm.order_type = 'SELF_REGISTRATION' AND wf.name = 'SIGNUP_MOBILE_PRE_PAID';

    COMMIT;

  END ext_self_10003_sigwf;

Answer 1

仅插入THEN值

CASE WHEN WF.STATUS_ID=0 THEN 10003 
WHEN WF.STATUS_ID=1 THEN 10018 END

Answer 2

从EVENT_ID

中删除CASE

...
CASE -- EVENT_ID
   WHEN WF.STATUS_ID=0 THEN 10003 
   WHEN WF.STATUS_ID=1 THEN 10018
END AS EVENTID
...

CASE有两种形式：

CASE
    WHEN <condition> THEN <value>
    WHEN <condition> THEN <value> -- etc
    ELSE <default value> -- optional
END

或者

CASE <value source>
    WHEN <match value> THEN <result value>
    WHEN <match value> THEN <result value> -- etc
    ELSE <default value> -- optional
END

Answer 3

案例陈述执行不正确。您可以通过两种方式使用案例： 1）

Case <some_variable or column_name> 
  When <value1> then <return_value>
else
  <return_value>
end;

2）

    Case 
      When <logical_stamtement (e.g. value1=0 or column1=0)> then <return_value>
    else
      <return_value>
    end

在你的程序中，你同时使用了它们。正确的代码应该是

create or replace PROCEDURE EXT_SELF_10003_SIGWF AS 

    BEGIN

    -- first empty TEMP_WF_WORKFLOW table
    EXECUTE IMMEDIATE 'TRUNCATE TABLE TEMP_WF_WORKFLOW'; 


    -- get WF_WORKFLOW table data 
    Insert into TEMP_WF_WORKFLOW(STATUS_ID,EVENT_ID,ORDER_NUMBER)
    Select WF.STATUS_ID,
    CASE WHEN WF.STATUS_ID=0 THEN 10003 
    WHEN WF.STATUS_ID=1 THEN 10018 END AS EVENTID
    ,TSM.ORDER_NUMBER FROM WF_WORKFLOW@FONIC_RETAIL WF 
    where WF.NAME='SIGNUP_MOBILE_PRE_PAID';

    commit;

    END EXT_SELF_10003_SIGWF;

Answer 4

 CASE EVENT_ID WHEN WF.STATUS_ID=0 THEN EVENT_ID=10003 
    WHEN WF.STATUS_ID=1 THEN EVENT_ID=10018 END AS EVENTID

您混合了 CASE 语句的两种不同语法。

1.simple_case_statement

   CASE [ expression ]

   WHEN condition_1 THEN result_1
   WHEN condition_2 THEN result_2
   ...
   WHEN condition_n THEN result_n

   ELSE result

   END

<强> 2.searched_case_statement

CASE 

   WHEN expression condition_1 THEN result_1
   WHEN expression condition_2 THEN result_2
   ...
   WHEN expression condition_n THEN result_n

   ELSE result

END

将表达式更改为 -

CASE 
   WHEN WF.STATUS_ID=0 THEN 10003 
   WHEN WF.STATUS_ID=1 THEN 10018
END AS EVENTID

按照此link查看语法文档。

更新 OP表示他仍然会收到缺少关键字错误。这是一个测试用例，表明它不是真的。缺少的关键字将使用正确的CASE语句修复。

SQL> CREATE OR REPLACE
  2  PROCEDURE EXT_SELF_10003_SIGWF
  3  AS
  4  BEGIN
  5    -- first empty TEMP_WF_WORKFLOW table
  6    EXECUTE IMMEDIATE 'TRUNCATE TABLE TEMP_WF_WORKFLOW';
  7    -- get WF_WORKFLOW table data
  8    INSERT
  9    INTO TEMP_WF_WORKFLOW
 10      (
 11        STATUS_ID,
 12        EVENT_ID,
 13        ORDER_NUMBER
 14      )
 15    SELECT WF.STATUS_ID,
 16      CASE
 17        WHEN WF.STATUS_ID=0
 18        THEN 10003
 19        WHEN WF.STATUS_ID=1
 20        THEN 10018
 21      END AS EVENTID,
 22      TSM.ORDER_NUMBER
 23    FROM WF_WORKFLOW@FONIC_RETAIL WF
 24    JOIN TMP_SOAP_MONITORING_IDS TSM
 25    ON TSM.SUBSCRIPTION_ID=WF.SUBSCRIPTION_ID
 26    WHERE TSM.order_type  ='SELF_REGISTRATION'
 27    AND WF.NAME           ='SIGNUP_MOBILE_PRE_PAID';
 28    COMMIT;
 29  END EXT_SELF_10003_SIGWF;
 30  /

Warning: Procedure created with compilation errors.

SQL> sho err
Errors for PROCEDURE EXT_SELF_10003_SIGWF:

LINE/COL ERROR
-------- --------------------------------------------------
7/3      PL/SQL: SQL Statement ignored
23/8     PL/SQL: ORA-00942: table or view does not exist
SQL>

在oracle CASE WHEN sql语句中丢失关键字错误

4 个答案: