Dynamic XML Source to a Fixed Target Table

Hi gurus,
Please help me on this one, I've been trying to work it around for 2 weeks now, and unfortunately, I can't think of any solutions anymore.
So here is the case:
I'm using ODI 11g and I'm loading XML files to Oracle Tables.
But in this case I have a dynamic XML file (number of columns varies, depends on the user input) as the source and I have to load it into a fixed Target Table.
Example:
XML SOURCE FILE (dynamic number of columns):
Column_A1 | Column_B1 | Column_C1 | Column_A2 | Column_B2 | Column_C3 | Column_A3 | Column_B3 | Column_C3 | | **
**means I don't have idea how many columns in one XML would be. It can be 6 columns, 9 columns, 3 columns. I do reverse engineer to get the latest XML structure.*
FIXED TARGET OUTPUT TABLE (3 columns only):
Column_A1 | Column_B1 | Column_C1
Column_A2 | Column_B2 | Column_C2
Column_A3 | Column_B3 | Column_C3
** | * | **
--END OF EXAMPLE*
So what I want to happen is that, everytime ODI detects that it is already the 4th column, 4th - 6th columns would append to the next row and 7th-9th would append to the next row, and goes on and goes on.
What do you think is the best way to do this? Or if there is any way?
Please please help me, it would be of great great help to the project I'm working.
If there's no way, I'm thinking of creating a PL/SQL within a KM for this one.
Thank you gurus'!
Regards,
-Vince
Edited by: Vindi on Aug 22, 2012 2:45 AM
Edited by: Vindi on Aug 23, 2012 6:57 PM

What is the minimum number of columns from source side..if the minimum number of column will be 3 then my logic may work.
Please confirm.
Because in case of odi reverse, odi will add the extra column to the datastore. If initially the souurce file has 3 columns then the target datastore will 3. In next reverse if the source file has 5 column then in the next reverse it will add 2 more column to the datastore. Again nexttime if the source file has 2 column ODI is not going remove/drop these 3 extra column.

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see MSDN documentation below
WHEN MATCHED THEN <merge_matched>
Specifies that all rows of target_table that match the rows returned by <table_source> ON <merge_search_condition>, and satisfy any additional search condition, are either updated or deleted according to the <merge_matched> clause.
The MERGE statement can have at most two WHEN MATCHED clauses. If two clauses are specified, then the first clause must be accompanied by an AND <search_condition> clause
from
http://msdn.microsoft.com/en-us/library/bb510625.aspx
Also I guess Composable DML which used is also not present in 2005
So in your case you can try this instead
DECLARE @DELETED_FILES table
File_Name varchar(100)
DELETE t
OUTPUT DELETED.File_Name INTO @DELETED_FILES
FROM dbo.table1 t
INNER JOIN dbo.table2 s
ON t.File_name = s.File_name
WHERE s.FILE_DESC = 'EDI'
AND s.[Processed_date] < DATEADD (WEEK, -10, Getdate ())
UPDATE r
SET r.Process_Delete_Date = GETDATE()
FROM dbo.table2 r
INNER JOIN @DELETED_FILES AS p
ON p.File_Name = r.File_Name
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