On 2013-01-26, Gavan Schneider <pg-...@snkmail.com> wrote: > On Saturday, January 26, 2013 at 08:13, Ian Pilcher wrote: > >>I need to cast a double precision into an integer, and I want to check >>that the value will actually fit (modulo rounding). >> >>Coming from a C/Java background, this seems like something that should >>be utterly trivial. In my searching, however, I can't seem to find any >>SQL equivalent of INT_MAX, Integer.MAX_VALUE, etc. >> > So far I haven't seen such defined constants but am happy to > share the RTFM moment. :-) > > I am sure you have already found this: ><http://www.postgresql.org/docs/9.2/static/datatype-numeric.html#DATATYPE-NUMERIC-TABLE> > >>Do I have to hard-code this value? >> > Or cast double to both numeric(13000,0) and integer and compare > them. A stored function could encapsulate this along with > raising the exception when required. If design is still fluid > and performance allows the numeric type could do the job without > fear of overflow.
there's no need to cast and compare. if the number doesn't fit the cast will fail with an exception. -- ⚂⚃ 100% natural -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
