Re: R: [Haskelldb-users] HaskellDB in an industrial environment

[Jeremy S. <jer...@li...>]

At Fri, 04 Feb 2005 15:08:24 +0100,
Bjorn Bringert wrote:
> 
> Santoemma Enrico wrote:
> > Btw, is it possible that the bug 'Repeated field names don't work' is
> > due to the fact that one cannot read the same field two times when
> > using ODBC? This is an old odbc error that I often (still) meet. In
> > haskell I strictly retrieve the record into memory before starting to
> > retrieve a field, and this fixes the error.
> 
> The problem is that the extensible record type that we created for 
> HaskellDB does not disallow creating a record which contains two fields 
> with the same label. HList, presented at Haskell Workshp 2004 has a 
> solution to this problem, see http://homepages.cwi.nl/~ralf/HList/paper.pdf

Speaking of which, do you think that we should try to convert
haskelldb to something like the scheme presented in the Hlist paper? I
am not familiar enough with the internals of haskelldb yet to compare
the existing scheme to the one proposed in hlist...

Jeremy Shaw.
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