錯誤使用插入CTE

Question

當我收到以下錯誤在SQL Server 2012：

無效的對象名稱庫「。

有沒有辦法修改語法，所以我不必使用表變量？問題出現在代碼的最後，我把它放在聲明中。

下面是代碼：

SET NOCOUNT ON 
declare @level int = 0 

DECLARE @DataLibraryName VARCHAR(500) 
SET @DataLibraryName = 'FN_PerfSalesChargeFeeReplacementText'; 

IF LTRIM(RTRIM(@DataLibraryName)) = '' 
    SET @DataLibraryName = null; 

WITH DataLibraryRaw AS 
( 
    SELECT 
     * 
     ,CAST(CAST(dataLibraryXML AS NTEXT) AS XML) dataLibraryXMLData 
     ,datasource_name dataLibraryName 
    FROM 
     tblrpt_datascript 
    --WHERE datasource_type = 'DLMERGE' 
), 
DataLibraryDep AS 
( 
    SELECT 
     dataLibraryName 
     ,dataLibraryXMLData.query('//SourceSpecification') [SourceSpecification] 
    FROM 
     DataLibraryRaw 
), 
DependenciesXML AS 
( 
    SELECT 
     dataLibraryName 
     ,CAST(REPLACE(REPLACE(CAST([SourceSpecification] AS NVARCHAR(MAX)), '#', '<item>#'), '}', '}</item>') AS XML) AS dataLibraryXMLData 
    FROM 
     DataLibraryDep 
), 
DataLibraries AS 
( 
    SELECT 
     dataLibraryName 
     ,d.i.query('.').value('.', 'nvarchar(max)') dependDataLibrary 
    FROM 
     DependenciesXML dx 
    CROSS APPLY 
     dataLibraryXMLData.nodes('//item') AS d(i) 
), 
Libraries AS 
( 
    SELECT 
     dataLibraryName parentDL 
     ,LTRIM(RTRIM(SUBSTRING([dependDataLibrary], CHARINDEX('=', [dependDataLibrary] ,1)+1 ,CHARINDEX('{', [dependDataLibrary], 1)-(CHARINDEX('=', [dependDataLibrary] ,1)+1)))) childDL 
    FROM 
     DataLibraries 
), 
RecursiveData AS 
( 
    SELECT 
     *, 0 AS LEVEL 
    FROM 
     Libraries 
    WHERE 
     parentDL = IsNull(@DataLibraryName, parentDL) 
) 
SELECT * 
FROM RecursiveData 

---- Recursive member definition 

insert RecursiveData 
    SELECT 
     m.parentDL, m.childDL, 
     @level + 1 
    FROM 
     Libraries m 
    INNER JOIN 
     RecursiveData r ON r.childDL = m.parentDL AND r.level = @level 

預先感謝您。

Answer 1

基於上述腳本，問題是，你從你的CTE做一個選擇：

SELECT * FROM RecursiveData

然後做您的插入：

insert RecursiveData 
SELECT m.parentDL, m.childDL, 
@level + 1 
FROM Libraries m 
INNER JOIN RecursiveData r 
ON r.childDL = m.parentDL and r.level = @level 

不能引用CTE在使用它的語句之後，所以只要SELECT *聲明在那裏，插入就會失敗。然而，另一個問題是，你似乎試圖插入到你最後一次CTE，RecursiveData中，這也不會像你期望的那樣工作。

它看起來像的代碼的最後一節之前，您插入應該是：

,RecursiveData AS (
    SELECT ParentDL, ChildDL, 0 AS LEVEL 
    FROM Libraries 
    WHERE parentDL = IsNull(@DataLibraryName, parentDL) 
    UNION ALL 
    SELECT l.PARENTDL, l.CHILDDL, r.LEVEL + 1 
    FROM Libraries l 
    JOIN RecursiveData r ON r.CHILDDL = l.PARENTDL 
    ) 
    SELECT * FROM RecursiveData 

而且你要離開插入完全關閉（或將其插入到你需要的任何表）。