[Haskell-cafe] custom SQL-to-Haskell type conversion in HDBC

Brandon Allbery allbery.b at gmail.com
Fri Aug 19 22:11:50 CEST 2011

On Fri, Aug 19, 2011 at 11:45, Erik Hesselink <hesselink at gmail.com> wrote:

> Note that PostgreSQL also doesn't work with decimals as precision:
> postgres=# select 1::decimal(4,2) * 1::decimal(4,2);
> ?column?
> ----------
>   1.0000
> (1 row)
> That should be 1.00 instead if you want the precision correctly
> represented.

Er?  Last I checked, that was exactly how precision worked over
multiplication; otherwise you are incorrectly discarding precision present
in the original values.  Unless you're assuming the OP actually wants an
incorrect flat precision model....

brandon s allbery                                      allbery.b at gmail.com
wandering unix systems administrator (available)     (412) 475-9364 vm/sms
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