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

Subject: Re: [Haskell-cafe] Takusen - reading from one db inserting into another
From: GÃnther Schmidt
Date: Mon, 18 Jan 2010 13:28:57 +0100
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.
GÃnther

Am 18.01.10 13:00, schrieb Alistair Bayley:
Hello GÃnther,

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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