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    <p>I think the better question is: What's the best way to move data from SQL Server to Oracle which deletes from MSSS every successfully delivered row?</p> <p>You do these in a loop to makes sure that when you add to one, you delete from the other.</p> <p>If some unknown random thing happens to error on the insert, you'll avoid removing the source record.</p> <p>That's the gist, right?</p> <p>There are much better ways to handle this kind of data movement then committing after each insert/delete distributed transaction loop.</p> <p>First off a commit in the middle of a loop is just bad. In Oracle it's a good way to cause other sessions to get ORA-01555 errors. So I would avoid that if possible. </p> <p>Second you should absolutely know what are the possible causes for reasonable errors on insert. You violate a column length, a FK, a UK... there's a finite list of what could break on insert. Big hairy bad breaks like Unable to extend tablespace SHOULD cause the system to grind to a halt. No need to trap for that. But application issues like I mentioned are easy to manage for.</p> <p>If I were writing this, I would bulk insert all of the rows using Oracle's <a href="http://www.oracle-base.com/articles/10g/DmlErrorLogging_10gR2.php" rel="nofollow">LOG ERRORS INTO</a> to avoid a full ROLLBACK when only one/few row(s) fail.</p> <p>Now you have a table which contains every failed row and the reason it failed. Now you can on the SQL Server side, delete all the rows NOT IN the list of failed ID's. </p> <p>You've accomplished the same thing but with Set based operations instead of SLOW-BY-SLOW, ooops, I mean row by row.</p>
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    1. COHmm, good points. Thank you very much for the LOG_ERRORS_INTO tip. ORA-28534: Heterogeneous Services preprocessing error is part of this story now, because of the date-time Field. This time we are trying to send the orders from Oracle to Sql-Server. Wonder if I will live enough to see ORA-001 NO ERRORS LIFE IS GOOD
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    2. COOne point of doing in the loop was, to avoid deleting source records that are just inserted during my process. I have to keep the numbers in VARRAY or something, then I have to MINUS with the LOG ERRORS INTO to get the id number of the source records to be deleted.
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    3. COI don't understand the last comment. You have a fistful of rows to move. Are you saying that the definition of that fistful isn't simple. I would have guessed that it was all the row with a timestamp > than the last time I moved them and <= the start time of my current operation. If it's just a range like that, then all you need to know is the failures, successes are everything else _in that time range_. Are you saying it's not the case that the range is defined so easily.
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