Oracle undo tablespace

Question

I used toad to connect to Oracle, issued a select query and while exiting it asked to issue commit or rollback. I pressed the escape key and the message box disappeared. Then I ended the connection. Will this cause any problems to the tables I queried? Will it cause the undo tablespace or rollback segment to go out of control? Thanks in advance.

Answer 1

This is what the Oracle PMON (Process Monitor) process will handle. If a session is terminated in a disorderly manner, then the session will be left in a state that must be cleared up. The PMON process will then roll back any active transactions.

So to answer your question: No, your transaction is no longer active and all your changes were rolled back (if you did not explicitly commit).