Re: SPARQL performance for ORDER BY on large datasets

On Aug 27, 2009, at 11:51 AM, Seaborne, Andy wrote:
> Yes - it's possible to implement.  It's something I have wanted to  
> do for a while now.
>

that's great, I'm looking forward to it.


> 	
>>
>> Regards,
>> Andy
>>
>> On Aug 27, 2009, at 9:32 AM, Bernhard Schandl wrote:
>>
>>> Hi,
>>>
>>>> I'm wondering for some time already if there is any triple store
>>>> that allows to define custom indexes on special predicates or
>>>> subsets of the whole set of triples/quads? All the existing stores
>>>> I know index over all triples in different combinations (spo,
>>>> pso, ...). Is there any research going on towards partial indexes
>>>> over user-defined subsets of triples? E.g. an index over all
>>>> xsd:dateTime literals.
>>>
>>> some time ago I was looking for triple stores that allow to
>>> customize the database schema, e.g., that allow me to specify
>>> something like "I want all foaf:Person resources together with their
>>> foaf:firstName and foaf:surname stored in a designated (optimized)
>>> table." If you are aware of any triple store aware of that
>>> functionality I would be happy to know.
>>>
>>> Best, Bernhard
>>>
>>
>>
>> http://www.langegger.at
>> ----------------------------------------------------------------------
>> Dipl.-Ing.(FH) Andreas Langegger
>> FAW - Institute for Application-oriented Knowledge Processing
>> Johannes Kepler University Linz
>> A-4040 Linz, Altenberger Straße 69
>>
>>
>>
>>
>>
>


http://www.langegger.at
----------------------------------------------------------------------
Dipl.-Ing.(FH) Andreas Langegger
FAW - Institute for Application-oriented Knowledge Processing
Johannes Kepler University Linz
A-4040 Linz, Altenberger Straße 69

Received on Thursday, 27 August 2009 10:08:20 UTC