Question

请参阅以下代码：

declare @Classification as varchar(5)
set @Classification =''
declare @ClassificationSQL as nvarchar(4000)
declare @PersonSQL as nvarchar(4000)
set @ClassificationSQL=''

declare @counts int

DECLARE NicheDeletionOffenderCursor CURSOR FOR  
    select classification from dbnicheoffenderclassificationlookup
    Open NicheDeletionOffenderCursor
    FETCH NEXT FROM NicheDeletionOffenderCursor INTO @Classification

    WHILE @@FETCH_STATUS = 0 
    BEGIN
    If @ClassificationSQL=''
        set @ClassificationSQL='classification like ' + char(39) + '%' + @Classification + '%' + char(39)
    else
        set @ClassificationSQL=@ClassificationSQL + ' OR classification like ' + char(39) + '%' + @Classification + '%' + char(39)
    FETCH NEXT FROM NicheDeletionOffenderCursor INTO @Classification
    END
CLOSE NicheDeletionOffenderCursor 
DEALLOCATE NicheDeletionOffenderCursor 

SET @ClassificationSQL = 'select @cnt=count(*) from tbl_goccivgperson where lid=@LID and (' + @ClassificationSQL + ')' 
SET @PersonSQL = 'SELECT * FROM tbl_goccivgperson WHERE LID=@LID and (' + @ClassificationSQL + ')' 

DECLARE @CoreSystemIndexValue varchar(100)
SET @CoreSystemIndexValue=''

DECLARE NicheDeletionCursor CURSOR FOR  
SELECT TOP 1 coresystemindexvalue from dbdisposals where datasetname='NICHECI'

    Open NicheDeletionCursor 
    FETCH NEXT FROM NicheDeletionCursor INTO @CoreSystemIndexValue
    WHILE @@FETCH_STATUS = 0  
        BEGIN
            EXECUTE sp_executesql @ClassificationSQL, N'@LID decimal(25,0),@cnt int OUTPUT', @LID=@CoreSystemIndexValue, @cnt=@Counts OUTPUT 'Line 38
            --If @Counts > 0
                --begin
                    --Check that all the nominals in Niche are ready for deletion
                    EXECUTE sp_executesql @PersonSQL, N'@LID decimal(25,0)', @LID=@CoreSystemIndexValue 'Line 42
                --end
            --Else
                --Check that all Persons (all are RCWs) in CIS and Niche are ready for deletion

        FETCH NEXT FROM NicheDeletionCursor INTO @CoreSystemIndexValue
        END
    CLOSE NicheDeletionCursor

DEALLOCATE NicheDeletionCursor

我得到的错误是：必须声明标量变量“@cnt”。注释掉第38行或第2行42解决了这个问题。问题似乎是第42行。在@PersonSQL中没有提到：@cnt所以我不明白为什么我会遇到这个问题。

Answer 1

您有此代码

SET @ClassificationSQL = 'select @cnt=count(*) from tbl_goccivgperson where lid=@LID and (' + @ClassificationSQL + ')' 
SET @PersonSQL = 'SELECT * FROM tbl_goccivgperson WHERE LID=@LID and (' + @ClassificationSQL + ')'

它使用@ClassificationSQL计算中的@PersonSQL变量，因此@cnt也会在那里结束。我想你想要做的事实上是

SET @PersonSQL = 'SELECT * FROM tbl_goccivgperson WHERE LID=@LID and (' + @ClassificationSQL + ')' 
SET @ClassificationSQL = 'select @cnt=count(*) from tbl_goccivgperson where lid=@LID and (' + @ClassificationSQL + ')'

或者更好的是，不要重复使用@ClassificationSQL变量

declare @ClassificationSQL as nvarchar(4000)
declare @PersonSQL as nvarchar(4000)
declare @ConditionSQL as nvarchar(4000) --or a name that makes sense

-- calculate @ConditionSQL 

SET @ClassificationSQL = 'select @cnt=count(*) from tbl_goccivgperson where lid=@LID and (' + @ConditionSQL  + ')' 
SET @PersonSQL = 'SELECT * FROM tbl_goccivgperson WHERE LID=@LID and (' + @ConditionSQL + ')'

必须声明标量变量“@cnt”

1 个答案: