[Haskell-cafe] The state of database libraries

Paul Visschers p.a.visschers at student.tue.nl
Sat Jul 5 05:12:53 EDT 2008

Hey Chris,

I've been fiddling around with the database stuff myself and I had the
same problems (on Linux). I eventually got both HaskellDB and HSQL to
work, and am now using HSQL because HaskellDB had very poor
documentation. I don't exactly know how I eventually got HSQL-MySQL to
work, but I think it might be the case that you need to install a MySQL
dev package first, as the haskell package only contains bindings to it.

Good Luck, Paul

P.S. It's nice to see I'm not the only one going into a Haskell frenzy
after the exams.

Chris Eidhof wrote:
> Hey everyone,
> I'm figuring out how to do databases in Haskell (on OS X). So far, I've
> tried the following approaches:
> 1. hdbc. I'd like to connect to MySQL, so I need the ODBC backend. I
> couldn't get this to work under OS X, while I installed myodbc, which
> seems to be broken.
> 2. hsql. The packages on hackage don't compile, so I grabbed the darcs
> version. hqsl itself installed perfectly, but when I try to compile
> hsql-mysql, it does not recognize that hsql is already installed and
> tries to recompile. Compiling fails, so I generated a .tar.gz of hsql
> using cabal sdist, put it in the .cabal/packages directory in the right
> place, and finally, it does compile. Now hsql-mysql starts compiling,
> but it finally fails with:
> MySQL.hsc:270:0:
>      error: ‘MYSQL_NO_DATA’ undeclared (first use in this function)
> MySQL.hsc:270:0:
>      error: (Each undeclared identifier is reported only once
> MySQL.hsc:270:0:  error: for each function it appears in.)
> So what is the state of hsql? And haskelldb? Are they actively maintained?
> Thanks,
> -chris_______________________________________________
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