Bayley, Alistair wrote:
[Moving to café, too]
There are three active database libraries: HDBC, HSQL and Takusen.
It is quite disappointing from my point of view. Recently there was
the same situation with the GUI libraires. The Haskell Community is
quite small to waste efforts, developing different libraries for
the same things. When I started with HSQL there were only two
database libraries: HaSQL for ODBC and libpq for PostgreSQL. They
both are dead, I think. I decided that it is useful to have one
abstract API that can cover all database bindings. I imagine
something like JDBC, ADO or DBI for Haskell. If you guys would like
this to happen then lets discuss what we want. I would be happy to
work on single project that can satisfy all needs.
Cheers, Krasimir
... The Haskell Community is quite small to waste efforts,
developing different libraries for the same things.
Yes, that could be considered undesirable. However, there is the
choice for users over which API to choose that best supports their
needs. In the use of an enumerator, Takusen has chosen quite a
different design space from HSQL and HDBC. Whether or not that proves
to be a good idea, or attractive to users, remains to be seen :-)
HaskellDB+HSQL seems to be to be the most mature, and actively
maintained. Although I'm keen to progress Takusen, I find it hard at
present to take the necessary time, so work seems to stall. I'd have
no bone to pick with HaskellDB+HSQL being promoted as the default
database API, but I still want to work on Takusen, because I think
there are some ideas worth exploring.
When I started Takusen, I was specifically interested in using
HaskellDB to interface to Oracle. At the time, HaskellDB did not use
HSQL, and HSQL lacked a unifying interface, so I started work on a
low-level library to Oracle (I was also keen to learn to use the
FFI). The design later evolved towards the enumerator approach (Oleg
persuaded me that it was a good idea) and the HaskellDB goal was
never reached. Now that HSQL supports Oracle, I can choose to use
HaskellDB with Oracle, so I suppose my original goal has been
satisfied.
Just for the record, the current darcs version of HaskellDB [1] works
with both HSQL and HDBC.
/Björn
[1] darcs get --partial http://cvs.haskell.org/darcs/haskelldb/
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