Hi Ian, Assuming the problem is with the optimizer do you get correct results if you set optimizer_features_enable to 10.1.0 at the session level? Regards, Fairlie "Ian Cary (C)" <Ian.Cary@xxxxxxxxxxxxxxxxxxxx> wrote: As there seem to a few people using 10.2 (10.2.0.2 on Solaris 9 in my case) I thought I'd share a scary issue with you all. Odd in the example below is a reasonably complex view that has been working fine in 10.1 for quite a while. MP409SH2> select count(*) from odd; COUNT(*) ---------------- 67311 Elapsed: 00:01:15.56 MP409SH2> create table very_odd as select * from odd; Table created. Elapsed: 00:07:34.00 MP409SH2> select count(*) from very_odd; COUNT(*) ---------------- 1371016 Elapsed: 00:00:01.84 This is a 100% genuine case where the select statement returns the wrong (substantially) number of rows. In 10.1 the view returns the correct 67311 rows. There doesn't seem to be any pattern or reason for the error and I only noticed it because I had the 10.1 results to hand. I'll be raising a tar as soon as Metalink sorts itself out but I thought I'd share this as I'm not sure I can 100% trust the results of any select statement on 10.2 Cheers, Ian . This email is only intended for the person to whom it is addressed and may contain confidential information. If you have received this email in error, please notify the sender and delete this email which must not be copied, distributed or disclosed to any other person. Unless stated otherwise, the contents of this email are personal to the writer and do not represent the official view of Ordnance Survey. Nor can any contract be formed on Ordnance Survey's behalf via email. We reserve the right to monitor emails and attachments without prior notice. Thank you for your cooperation. Ordnance Survey Romsey Road Southampton SO16 4GU Tel: 023 8079 2000 http://www.ordnancesurvey.co.uk -- http://www.freelists.org/webpage/oracle-l Fairlie Rego Senior Oracle Consultant Optus Telecommunications www.optus.com.au --------------------------------- How low will we go? Check out Yahoo! Messenger?s low PC-to-Phone call rates.