[Haskell-cafe] Takusen - reading from one db inserting into another

Günther Schmidt gue.schmidt at web.de
Mon Jan 18 07:28:57 EST 2010

Hello Alistair,

sorry for asking twice, I had forgotten that.

I took some time to try to figure out how to do it and always concluded 
from my understanding of Takusen that it shouldn't be possible. At least 
it seems I got that right, which is good by itself :) .

Thank you for your troubles but do not worry about the patch, I have 
switched back to using HDBC meanwhile. HDBC-ODBC has a slight problem 
with Access, I couldn't insert Doubles, well I could but the decimal 
separator got swallowed, and I worked around it by using pr-efilled 
SQL-statement strings instead of bound/prepared ones.


Am 18.01.10 13:00, schrieb Alistair Bayley:
> Hello Günther,
>> I know how to use Takusen with a *single* connection, but I cannot figure
>> out how to read from one database while inserting to another.
> At present it's not possible. The lats time you asked about it, Oleg
> and I tried a design where the DBM monad becomes a DBMT monad
> transformer. This permits multiple connections, but the resulting
> user-land code didn't work as well as I wanted. If you like I can try
> to tidy it up and send you the darcs patch.
> Alistair

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