Re: [Haskell-cafe] Database.postgreSQL.Simple - ambigious type

Thx, I changed now from query to query_ Now the coding is like that: ------------------------------------------------------------------------ {-# LANGUAGE OverloadedStrings #-} import Database.PostgreSQL.Simple import Database.PostgreSQL.Simple.FromRow hello :: (FromRow a) => IO [a] hello = do conn <- connect defaultConnectInfo query_ conn "select 2 + 2" main = return () ------------------------------------------------------------------------ I've no errors any more. But: I don't see any result (for sure, it is not coeded yet) I need some help to get data from "hello" via "FromRow" into the main function. E.g. I want to put the "hello" database result (the number "4") to the screen. Could anybody give an advice how I can accomplish this? Kind regards Hartmut On 08/17/2013 07:53 PM, Brandon Allbery wrote:

On Sat, Aug 17, 2013 at 1:35 PM, Hartmut Pfarr mailto:hartmut0407@googlemail.com> wrote:

(The example is identical to the first 5-liner-example in the package documentation)

As I read it, the example has a typo: it should be using `query_` instead of `query`. See http://hackage.haskell.org/packages/archive/postgresql-simple/0.3.5.0/doc/ht... for detals.

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com mailto:allbery.b@gmail.com ballbery@sinenomine.net mailto:ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net