2008/10/28 David Rowley <[EMAIL PROTECTED]>: > Hitoshi Harada Wrote: > >> As I promised, version 7 of the window functions is now released. At >> the same time, git repository branch comes back to master. >> >> git: http://git.postgresql.org/?p=~davidfetter/window_functions/.git >> patch: http://umitanuki.net/pgsql/window_functions.patch.20081028.gz > > I've been testing for a couple of hours now and just comparing results to > the results Oracle gives me. Perhaps not the best method but it's faster > than reading through the spec. > > I managed to get a seg-fault with the following query. > > select salary,dense_rank() over (order by salary desc) > from employee > group by salary; > > > It's the group by that does it. > > test=# select salary,dense_rank() over (order by salary desc) from employee > group by salary; > server closed the connection unexpectedly > This probably means the server terminated abnormally > before or while processing the request. > The connection to the server was lost. Attempting reset: Failed. > > > It seems to be possible to crash not just dense_rank() and rank(). > > This crashes too. > > select relid,AVG(seq_Scan) OVER (ORDER BY relid) > FROM pg_stat_user_tables > GROUP BY relid,seq_scan;
sample=# select relid,AVG(seq_Scan) OVER (ORDER BY relid) sample-# FROM pg_stat_user_tables sample-# GROUP BY relid,seq_scan; relid | avg -------+-------------------- 16385 | 7.0000000000000000 16391 | 3.5000000000000000 16394 | 2.3333333333333333 (3 rows) Hmm, I tested it on my environment, but doesn't crash. If you have further information on that, please tell me. And yes, I haven't paid attention for such cases. I think at least regression test is necessary to be added. > Looking forward to seeing windowing functions in 8.4! Thanks for your testing. Regards, -- Hitoshi Harada -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
