bcp xml 未将所有行导出到单个文件

Question

我有一个 sql 查询，它将表的每个 XML 行导出到单个 XML 文件。该过程完美运行，除了它停止并且不会一次处理所有行。我必须更改行号才能从它停止的地方开始。它将使用此过程无错误地处理所有行，但是我希望它一次处理所有行。 这是我的查询：

DECLARE 
@FILENAME VARCHAR(500),
@bcpcmd  VARCHAR(2000),
@RN VARCHAR(10),
@i int;
DECLARE @Table table (RN int, IsDone char(1))
INSERT @Table SELECT RN, 0 FROM [x_rpt].[dbo].[x_abc] WHERE RN>=1 --this is where I update RN to process records where it leaves off--
SET @i=0
WHILE @i<= (SELECT COUNT(*) FROM @Table WHERE IsDone = '0')
BEGIN 
SELECT TOP 1  @RN=RN FROM @Table WHERE IsDone = 0
SET @FILENAME = '"C:\temp\data\abc\Jan_2016_'+@RN+'.xml"'
SET @bcpcmd = 'BCP "SELECT [XML] from [x_rpt].[dbo].[x_abc] WHERE RN='+@RN+'" queryout "' 
SET @bcpcmd = @bcpcmd + @FILENAME + '" -w -T -S "SERVER"' 

EXEC master..xp_cmdshell @bcpcmd

UPDATE @Table set IsDone='1' where RN=convert(int,@RN)
SET @i=@i+1

END

Answer 1

尝试使用基于CURSOR 的方法：

CREATE TABLE SomeDB.dbo.MockUp(RN INT,[XML] XML);
INSERT INTO SomeDB.dbo.MockUp VALUES
 (1,N'<test RN="1"/>')
,(17,N'<test RN="17"/>')
,(-300,N'<test RN="-300"/>');

DECLARE 
@FILENAME VARCHAR(500),
@bcpcmd  VARCHAR(2000),
@rn INT;
DECLARE c CURSOR FOR SELECT RN FROM SomeDB.dbo.MockUp
OPEN c;
FETCH NEXT FROM c INTO @rn;

WHILE @@FETCH_STATUS  = 0
BEGIN
    SET @FILENAME = '"C:\SomePath\Jan_2016_'+CAST(@rn AS VARCHAR(MAX))+'.xml"'
    SET @bcpcmd = 'BCP "SELECT [XML] from SomeDB.[dbo].MockUp WHERE RN='+CAST(@rn AS VARCHAR(MAX))+'" queryout "' 
    SET @bcpcmd = @bcpcmd + @FILENAME + '" -w -T -S ' + @@SERVERNAME 

    EXEC master..xp_cmdshell @bcpcmd    

    FETCH NEXT FROM c INTO @rn;
END 

CLOSE c;
DEALLOCATE c;
GO

DROP TABLE SomeDB.dbo.MockUp

调整路径和数据库/架构/表/列名...