bcp xml not exporting all rows to individual files - sql

Question

I have a sql query that exports each XML row of a table to individual XML files. The process works perfectly, except it stops and does not process all rows at once. I have to change the row number to start where it left off. It will process all the rows with no errors using this procedure, however I would prefer that it process all rows at once.
This is my query:
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

Try to use a CURSOR based approach:
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
Adjust path and database / schema / table / column names...