[Haskell-cafe] Re: simple hsql question

Alexander Kotelnikov sacha at myxomop.com
Mon Aug 17 16:14:48 EDT 2009

Ok, let me ask it in another way. Is there a good way to access
databases, mysql in particular, from haskell program?

>>>>> On Sun, 16 Aug 2009 18:54:32 +0400
>>>>> "AK" == Alexander Kotelnikov <sacha at myxomop.com> wrote:
AK> Hi
AK> I wanted to see what access to databases HSQL provides and I stumbled in
AK> the very beginning. Assume I have a table map1 with attributes "i" and "s"
AK> interger and varchar() respectively. The following code fails (with
AK> segfault) for me. And I see no other way to tell compiler that I am
AK> expecting an interger to be found as 'i' in a fetched row.
AK> import Database.HSQL
AK> import Database.HSQL.MySQL
AK> main :: IO ()
AK> main = do
AK>     c <- connect "localhost" "tx_test" "sacha" ""
AK>     s <- query c "SELECT i FROM map1"
AK>     print $ getFieldsTypes s
AK>     i <- (getFieldValue s "i")::IO Int
AK>     print i
AK>     disconnect c
AK> -- 
AK> Alexander Kotelnikov
AK> Saint-Petersburg, Russia
Alexander Kotelnikov
Saint-Petersburg, Russia

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