Re: [Exist-open] Roadmap - Next releases

[Pierrick B. <pie...@cu...>]

Hi,

Michael Beddow a écrit :

> I think Bruno meant FLOWR expressions *performance* rather than support,

It would have been better to make it clear then :-) Never mind.

> and
> I also suspect that a big area for performance improvements in where clauses
> concerns sorting.

So... in order by clauses ;-)

Well, don't expect anything really new in this area (except, erm, when 
you want to sort... empty sequences). We have proposed this improvement 
as an "idea" for Google SoC 
(http://exist.sourceforge.net/summer.html#N102BE) and only one student 
has applied for it (although it wasn't such a difficult task IMHO). 
Unfortunately, he didn't look very motivated and the 2 "slots" allocated 
by Google went to other students as you already know.

However, our new modular indexing stuff could greatly ease the 
development of index-driven sorts. We still have some details to sort 
out (like the hierarchy in which we - and any contributor - should put 
them) and I will post a HOWTO relying on one of my use cases probably by 
mid-june. I also plan to ask Akhil, our Google SoC student, to move the 
fulltext-index to the new architecture (if Wolfgang hasn't done so before).

With at least 3 real examples of such indexes and of the way they could 
be used, I hope we'll get more contributions to the project.

I also remind that we can expect a major performance boost on some of 
our queries. That should make things faster even though sorting is as 
slow as before :-)

Cheers,

-- 
Pierrick Brihaye, informaticien
Service régional de l'Inventaire / DRAC Bretagne
mailto:pie...@cu... / tél : +33 (0)2 99 29 67 78
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