20 Aug
2011
20 Aug
'11
10:37 a.m.
On Friday, 19 August 2011, Erik Hesselink wrote: [...]
Perhaps a solution would be to not treat the database precision as your primary source of information, but represent that in Haskell using some data type that correctly propagates precision information, and marshall your database data to and from that. This means some duplication of information (precision in both database and Haskell) but you do the same with NULL and Maybe, etc. I guess that's inherent to (the way HDBC does) database access.
That's exactly what I'm after: getting the data out of the db as a Haskell data type that preserves the precision information (which the use of Rational does not). -- Henry House +1 530 848-1238