On 15/04/2014 17:20, David G Johnston wrote: > Willy-Bas Loos-3 wrote >> Hi, I ran into some strange behavior. Seems like a bug to me? >> >> wbloos=# select round(0.5::numeric), round(0.5::double precision); >> round | round -------+------- 1 | 0 (1 row) > > Not a bug; and likely to simple to have escaped notice this long so > the first reaction should be "what am I missing here?" > > [google: round .5 postgresql] > > http://grokbase.com/t/postgresql/pgsql-hackers/03ap11tckn/round-function-wrong/oldest > > Round( numeric ) - 0.5 rounds away from zero Round( float ) - > platform dependent, IEEE 0.5 rounds toward even > > You can argue the decision but at this point it's not likely to > change. Interestingly, I get different results (on both 9.1.4 and 9.3.0) on Windows: postgres=# select round(0.5::numeric), round(0.5::double precision); round | round -------+------- 1 | 1 (1 row) postgres=# select version(); version ------------------------------------------------------------- PostgreSQL 9.1.4, compiled by Visual C++ build 1500, 64-bit (1 row) .... Same on 9.3.0. Ray. -- Raymond O'Donnell :: Galway :: Ireland rod@xxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
