名称为“cursor_name”的游标不存在 [英] A cursor with the name 'cursor_name' does not exist
本文介绍了名称为“cursor_name”的游标不存在的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个代码使用嵌套的游标。当我解析它,SQL工作室告诉我命令成功完成,但每当我执行,我得到一堆重复一个游标名为'cursor_stats'不存在。对于在中提到的cursor_stats的每一行显示错误消息,然后重复多次。任何想法我的问题是什么?
I have a code the uses nested cursors. When I parse it, SQL studio tells me "Command(s) completed successfully," but whenever I execute, I get a bunch of repeated "A cursor with the name 'cursor_stats' does not exist." The error message displays for every line cursor_stats is mentioned in, then repeats many times. Any idea what my problem is?
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
推荐答案
您不应
http://msdn.microsoft.com/en-us/library/ms188782.aspx
只有在所有处理完成后才执行
Only do it after ALL processing is finished
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