Question

我正在处理一个在后台有很多select语句和计算的视图。

一个游标查询导致问题，我不知道从哪里开始解决此问题。

下面的SQL语句工作正常。我添加了WAn_AnzTage，TWorkflowAntraege存储在@_wananztage和declare cur cursor for select WPo_DatumVon, WPo_DatumBis, WPo_AbwArt, WPo_AbwTag --, WAn_AnzTage from TWorkflowAntraege inner join TWorkflowPool on WAn_AntragsNr = WPo_AntragsNr inner join TAbwArt on Abw_AbwArt = WPo_AbwArt where wan_persnr = @3 and (Wan_WorkflowStatus = 0 or WAn_WorkflowStatus = 4) and Wan_Antragsart = 2 and WPo_AbwArt like @_likeabw and ((WPo_DatumVon >= @_date and WPo_DatumBis <= @5) OR (WPo_DatumVon < @_date and WPo_DatumBis >= @_date) OR (WPo_DatumVon < @5 and WPo_DatumBis >= @5)) and WPo_AbwArt like @_likeabw open cur fetch next from cur into @_datumvon, @_datumbis, @_abwart, @_abwtag --, @_wananztage while (@@FETCH_STATUS = 0) begin -- something something -- not touching WAn_AnzTage yet. end close cur deallocate cur中，用于获取下一个值。现在，这两个新增内容已从脚本中注释掉。一旦我将它们添加到脚本中，我就不再获得返回值了。

但是，当我使用固定值将游标作为SQL查询本身运行在游标之外时，一切正常。

IndexOf(input) > -1

Answer 1

试试这样。

首先将记录插入临时表，然后使用临时表中的记录。

CREATE TABLE #temp_TWorkflowAntraege (
    WPo_DatumVon NVARCHAR(10)
    ,WPo_DatumBis NVARCHAR(10)
    ,WPo_AbwArt NVARCHAR(10)
    ,WPo_AbwTag NVARCHAR(10)
    )

insert into #temp_TWorkflowAntraege
SELECT WPo_DatumVon
    ,WPo_DatumBis
    ,WPo_AbwArt
    ,WPo_AbwTag --, WAn_AnzTage
FROM TWorkflowAntraege
INNER JOIN TWorkflowPool ON WAn_AntragsNr = WPo_AntragsNr
INNER JOIN TAbwArt ON Abw_AbwArt = WPo_AbwArt
WHERE wan_persnr = @3 
    AND (Wan_WorkflowStatus = 0 OR WAn_WorkflowStatus = 4) 
    AND Wan_Antragsart = 2 
    AND WPo_AbwArt LIKE @_likeabw 
    AND ((WPo_DatumVon >= @_date 
    AND WPo_DatumBis <= @5) OR (WPo_DatumVon < @_date AND WPo_DatumBis >= @_date) OR (WPo_DatumVon < @5 AND WPo_DatumBis >= @5)) 
    AND WPo_AbwArt LIKE @_likeabw


DECLARE cur CURSOR
FOR
SELECT WPo_DatumVon
    ,WPo_DatumBis
    ,WPo_AbwArt
    ,WPo_AbwTag
FROM #temp_TWorkflowAntraege

OPEN cur

FETCH NEXT
FROM cur
INTO @_datumvon
    ,@_datumbis
    ,@_abwart
    ,@_abwtag --, @_wananztage

WHILE (@@FETCH_STATUS = 0)
BEGIN
    -- something something
    -- not toching WAn_AnzTage yet.
END

CLOSE cur

DEALLOCATE cur

Answer 2

尝试将Declare语句更新为：

Declare cur Cursor Local Fast_Forward For

这可以防止生成光标时出现任何类型的锁定或延迟。

SQL Server游标左连接

2 个答案: