Morning Nuno, >> 2- They slow down parsing and execution. Steve Adams had an article on this in >> his web site but it's now gone. I've tested his conclusions all the way to 10g >> and they were still valid. I had a funny feeling that you would have checked. Thanks! >> ... >> For this last one I simply setup a login trigger that alters the session for >> every application user to point to the schema where the app's tables live. Me too. I love the "alter session set current_schema" ability. And, even better, in a logon trigger, the user logging on doesn't need alter session rights to execute the statement. Brilliant! Cheers, Norm. Information in this message may be confidential and may be legally privileged. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else. We have checked this email and its attachments for viruses. But you should still check any attachment before opening it. We may have to make this message and any reply to it public if asked to under the Freedom of Information Act, Data Protection Act or for litigation. Email messages and attachments sent to or from any Environment Agency address may also be accessed by someone other than the sender or recipient, for business purposes. If we have sent you information and you wish to use it please read our terms and conditions which you can get by calling us on 08708 506 506. Find out more about the Environment Agency at www.environment-agency.gov.uk -- //www.freelists.org/webpage/oracle-l