Off hand I don't think you can. I recall working with oracle recently and noticing table creation was immediate.
One question that stands out is why would you ever want to randomly create tables? Most applications run with fixed table structures with the exception of upgraders/installers. I can only hope the table creation isn't happening all the time or you can easily end up with unmanageable table sets. Please describe why you are creating tables on the fly and we might be able to help you try another technique.
Oracle does an implicit commit before and after each DDL statement, so no you can't rollback.
Joined: Aug 04, 2006
Ok thanks to all for replying. I now understand that it is a limitation of oracle. (The reason I was trying to roll back DDL is because I am working with a Java program which runs reports. In order for this program to run a report, it creates lots of temporary tables on the fly in order to calculate metrics.) I wanted to roll these back.