名称'cursor_name'的光标不存在

Question

我有一个代码使用嵌套游标。当我解析它时，SQL工作室告诉我“命令（s）成功完成”，但是每当我执行时，我都会得到一堆重复的“一个名为'cursor_stats'的游标不存在。该错误消息显示每一行cursor_stats被提及，然后重复多次。任何想法我的问题是什么？

DECLARE @dc_grp AS VARCHAR(50) 
DECLARE @reqt_id AS INT 

DECLARE cursor_pairs CURSOR FOR 
SELECT DISTINCT dc.dc_grp, dcx.reqt_id 
FROM DC_GRP dc INNER JOIN 
     DC_GRPX dcx ON dc.dc_grp = dcx.dc_grp INNER JOIN 
     REQT req ON dcx.reqt_id = req.reqt_id 
WHERE dc.calc_stddev = 1 AND req.v_a = 'V' AND dcx.stddev_last_update != CONVERT(datetime, Convert(int, GetDate())) 
ORDER BY dc.dc_grp, dcx.reqt_id 

-------------------------------------- 
DECLARE @vavg AS FLOAT 
DECLARE @vstddev AS FLOAT 

DECLARE cursor_stats CURSOR FOR 
SELECT AVG(r.[var]), STDEV(r.[var]) 
FROM RESULTS r INNER JOIN 
     INSTANCE i ON r.inst_id = i.inst_id 
WHERE i.dc_grp = @dc_grp AND r.reqt_id = @reqt_id AND r.[var] != 0 AND r.inst_id IN 
      (
      SELECT TOP 100 inst_id 
      FROM RESULTS 
      WHERE reqt_id = @reqt_id 
      ORDER BY inst_id DESC 
     ) 

--------------------------------------- 

OPEN cursor_pairs 
    FETCH NEXT FROM cursor_pairs INTO @dc_grp, @reqt_id 
    WHILE @@FETCH_STATUS = 0 
    BEGIN 
    OPEN cursor_stats 
     FETCH NEXT FROM cursor_stats INTO @vavg, @vstddev 
     WHILE @@FETCH_STATUS = 0 
     BEGIN 
      PRINT @dc_grp + ' ' + @reqt_id + ' ' + @vavg + ' ' + @vstddev 
     FETCH NEXT FROM cursor_stats INTO @vavg, @vstddev 
     END 
    CLOSE cursor_stats 
    DEALLOCATE cursor_stats 
    FETCH NEXT FROM cursor_pairs INTO @dc_grp, @reqt_id 
    END 
CLOSE cursor_pairs 
DEALLOCATE cursor_pairs 

Answer 1

您不应该在0123循环中使用DEALLOCATE cursor_stats。

http://msdn.microsoft.com/en-us/library/ms188782.aspx

只有做到这一切处理完毕后