What will happen after this?

I have a procedure kicked off yesterday to update a table. But I killed it this morning. Just after I killed the session, I kicked off another SQL to perform the same task to update the same table and same columns but faster.
What is happening right now is: the Oracle is performing a roll back on the killed procedure while the new SQL is running.
So here are my questions:
1. what will happen later when the SQL is completed and the roll back is not done yet?
2. Will the roll back affect the new SQL updates?
Thanks,
Edited by: user644467 on Mar 11, 2011 9:37 AM

Dive into the concepts manual. A basic concept of Oracle [url http://download.oracle.com/docs/cd/B28359_01/server.111/b28318/consist.htm#CNCPT020]concurrency and consistency is that each (something) gets a view of the database at the start of the (something). (something) is usually a transaction or statement, depending on configuration and programming. Oracle uses System Change Numbers to figure out if each view should include any particular version of block data, kind of like a clock.
So basically, it all works, but you may see performance impacts just because stuff is happening, and you may see odd effects if you don't understand what you are doing. It is different than other database engines.

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