On 7/10/17, Jean-Marie CUAZ <jm.c...@orens.fr> wrote: > Hello, > > Below is a recipe on a "best effort" basis, to truncate fp numbers on > the right side of the decimal separator with SQLite.
I don't understand how this is different from "round(N,3)"? What are you trying to do to the fp number N that "round(N,3)" does not do? What am I missing? > > It is not intended to correct any fp numbers processing, but only to > discard, without any rounding, unwanted fractional digits. > > The following is directed to discard all digits of a number after the > third fractional position (slight and easy adjustments must be done for > different positional truncations) : > > round( CAST(/expression/ AS INTEGER) > > + /((expression/ * 1000 % 1000 ) / 1000 ), 3) > > (round() is used against eventually imprecise representation resulting > from the top level addition operation) > > Caveat : force an eventual INTEGER representation resulting from > /expression/ to its equivalent REAL representation (ie : x -> x.0) > > (not a pb for me) > > Improvements/comments welcome (and wil be happy when an equivalent > function finds its way into SQLite) > > Thanks. > > -jm > > > > > > > --- > L'absence de virus dans ce courrier électronique a été vérifiée par le > logiciel antivirus Avast. > https://www.avast.com/antivirus > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users > -- D. Richard Hipp d...@sqlite.org _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
