2009/9/2 Tom Lane <t...@sss.pgh.pa.us>: > Pavel Stehule <pavel.steh...@gmail.com> writes: >> create table x1 (a integer); >> insert into x1 >> values(2),(2),(3),(3),(4),(4),(5),(5),(6),(6),(6),(8),(9),(9),(10),(10); > >> postgres=# select row_number() over (order by a), row_number() over >> (order by a desc) from x1; >> row_number | row_number >> ------------+------------ >> 16 | 1 >> 15 | 2 >> 14 | 3 >> 11 | 4 >> 13 | 5 >> 12 | 6 >> 9 | 7 >> 10 | 8 >> 7 | 9 >> 8 | 10 >> 5 | 11 >> 6 | 12 >> 4 | 13 >> 3 | 14 >> 1 | 15 >> 2 | 16 >> (16 rows) > >> I am not sure, is this correct? > > I don't see any grounds for arguing that it's wrong. The results for > rows with equal "a" values are indeterminate.
I can understand it. So I found Joe Celko's bug :) regards Pavel Stehule > > regards, tom lane > -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
