Question

我在oracle数据库中创建了一个在ref-cursor中返回数据的过程，我希望它也将此游标的rowcount也作为输出变量返回。测试后，P_count变量被正确填充，但是当我试图打开光标时，ORA-01002：取消序列＆＃39;错误被解雇我以前读过它，我发现问题是因为我在我的代码中使用了一个fetch语句。但直到现在我还没有发现如何解决它。感谢任何帮助，谢谢。以下是我的程序：

PROCEDURE IS_CLIENT_LOGGED_IN (
  P_CLIENT_NUM  Varchar2,
  P_CURSOR out  SYS_REFCURSOR ,
  P_COUNT OUT   NUMBER,
  P_ERROR out   Varchar2
) AS
  cur_rec Varchar2(1024);
BEGIN
   BEGIN 
     Open P_CURSOR FOR
       SELECT ID
         FROM tbl_registration
        WHERE tbl_client_id = P_CLIENT_NUM  
          AND tbl_logout_date is null;

     LOOP
      FETCH P_CURSOR INTO cur_rec;  
      EXIT WHEN P_CURSOR%notfound;
      P_COUNT := P_CURSOR%rowcount;--will return row number beginning with 1
     END LOOP;
   EXCEPTION WHEN OTHERS THEN 
     P_ERROR := 'Unable to select Data from tbl_registration' ||SQLERRM;
   END;    
END IS_CLIENT_LOGGED_IN;

Answer 1

根据您的评论，程序应如下所示：

PROCEDURE IS_CLIENT_LOGGED_IN (
  P_CLIENT_NUM  Varchar2,
  P_CURSOR out  SYS_REFCURSOR ,
  P_COUNT OUT   NUMBER,
  P_ERROR out   Varchar2
) AS
  cur_rec Varchar2(1024);
BEGIN
     Open P_CURSOR FOR
       SELECT ID
         FROM tbl_registration
        WHERE tbl_client_id = P_CLIENT_NUM  
          AND tbl_logout_date is null;

     LOOP
      FETCH P_CURSOR INTO cur_rec;  
      EXIT WHEN P_CURSOR%notfound;
      P_COUNT := P_CURSOR%rowcount;--will return row number beginning with 1
     END LOOP;
     CLOSE P_CURSOR;

     Open P_CURSOR FOR
       SELECT ID
         FROM tbl_registration
        WHERE tbl_client_id = P_CLIENT_NUM  
          AND tbl_logout_date is null;

   EXCEPTION WHEN OTHERS THEN 
     P_ERROR := 'Unable to select Data from tbl_registration' ||SQLERRM;
END IS_CLIENT_LOGGED_IN;

效率不高，但这就是你所要求的。无论如何，我没有看到任何理由逐一增加P_COUNT。

制作

SELECT COUNT(*) INTO P_COUNT
     FROM tbl_registration
    WHERE tbl_client_id = P_CLIENT_NUM  
      AND tbl_logout_date is null;

Open P_CURSOR FOR
   SELECT ID
     FROM tbl_registration
    WHERE tbl_client_id = P_CLIENT_NUM  
      AND tbl_logout_date is null;

得到相同的。

ORA-01002：取消顺序

1 个答案: