On Jul 15, 2010, at 7:25 PM, Tom Lane wrote: > * I didn't like this bit in cash_numeric(): > > result->n_sign_dscale = NUMERIC_SIGN(result) | fpoint; > > Not only is that unwarranted chumminess with the implementation of > numeric, it's flat-out wrong. If the result isn't exactly the right > number of digits (say, it's 12.33999999 instead of the desired 12.34) > this just hides the extra digits, it doesn't make the result correct. > The right way is to use numeric_round(), which not only sets the dscale > where we want it but rounds off any inaccuracy that might have crept in > from the division.
Sorry about that. Is there documentation anywhere for backend functions and types? I couldn't find any, so I just looked through numeric.h to see what looked like it might work. I didn't find numeric_round, since it's declared in builtins.h. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
