Re: [Haskelldb-users] Exception: No match in record selector Database.HaskellDB.Sql.attrs

[Guenther S. <gue...@we...>]

Hi Justin,

the explanation, I believe, is found here: 
http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Exception.html#t%3ARecSelError

I'm just wondering what I did that would eventually cause it in the 
first place.

Quite possible I construct my code, ie the Query (Rel whatever) in a 
way, or in an order, that does compile but throws a runtime error 
nevertheless.

I'm using ghc 6.10.

Would you happen to have some brief example of how to do intersect, 
union or minus properly?

Günther



Justin Bailey schrieb:
> I don't see a place in the source where that exception is thrown
> (grepping for variations on the error string didn't give me anything).
>  Are you sure it's HaskellDB?
>
> On Wed, Apr 15, 2009 at 8:17 AM, Guenther Schmidt <gue...@we...> wrote:
>   
>> Hi all,
>>
>> I get this error
>>
>> Exception: No match in record selector Database.HaskellDB.Sql.attrs
>>
>> in some cases when I do union, intersection or minus.
>>
>> What does that mean?
>>
>> Günther
>>
>>
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