[Haskell-cafe] Database written in Haskell?

Günther Schmidt gue.schmidt at web.de
Fri Aug 7 20:15:22 EDT 2009

Hi Alex,

very nice to hear from you and thank you very much for Happs.

I'm quite familiar with IxSet and loved it, however there where a few  
things that made it unfeasable for the particular application. It must be  
able run on Win2k machines so you can imagine the hardware is rather low  
end. As Happs-IxSet runs, to my knowledge, entirely in memory, that was a  
problem right there, SQLite does not.

The other thing was that Happs-IxSet uses Data.Set as its backend so to  
speak. That meant that duplicates (some of the records are duplicates and  
I can't help that) gotten "swallowed" with out me noticing at first, well  
apart from the sums no longer adding up of course.

Also Happs IxSet creates elements of the same type or tuple, they are no  
projections out of the box.


Am 08.08.2009, 01:43 Uhr, schrieb S. Alexander Jacobson  
<alex at alexjacobson.com>:

> HAppS' IxSet library gives relational operations but does not have a SQL  
> interface.  Am thinking of changing the name to RelSet to make the  
> functionality clear.  You can use HAppS.State  to give ACID properties  
> to operations on this data structure.
> -Alex-
> On 8/1/09 12:15 AM, Günther Schmidt wrote:
>> Hi,
>> is there an SQL database written in Haskell like HSQLDB which is  
>> written in Java?
>> Günther
>> _______________________________________________
>> Haskell-Cafe mailing list
>> Haskell-Cafe at haskell.org
>> http://www.haskell.org/mailman/listinfo/haskell-cafe

More information about the Haskell-Cafe mailing list