New helper query interface method

[Paul Harrison]

KevinBenson wrote:
>>From what I could tell from Yuji e-mail the main thing is about not
> returning so much data all at once to the client.  Somebody a long time ago
> mentioned a resumptionToken or pagingID concept on the query/search.  I
> think this is something that would be good and needed.  So you could page
> through your query results.  That way you might not return thousands at a
> time, but a certain amount and let the client page through all the results
> with the registry web service.  A user may send a global query; not even
> sure if we could handle returning 11,000 resources at once, so this is
> something we should look into.  The idea would be is to return a pagingID
> then a client who wants to see more would send it back again to the registry
> web service to get the next set of Resources.

This is a good idea that is worth considering..
> 
> Cheers,
> Kevin
> 
> FYI, I will say Astrogrid does use a maxcount kind of property, so that is
> the maximum number of resources that is returned from the registry.  But
> having a paging system would be nicer in case a user wants to see more
> results.

A max return count that is set on the server is a bad idea - we have 
spend time tearing our hair out in the past wondering why a resource was 
not returned, when it had been cut off silently by such a mechanism..

> 
> -----Original Message-----
> From: owner-registry at eso.org [mailto:owner-registry at eso.org]On Behalf Of
> Tony Linde
> Sent: 14 April 2005 08:27
> To: 'Registry List'
> Subject: RE: New helper query interface method
> 
> 
> 
>>I also think that Yuji Shirasaki's idea of having a search
>>that returns a list of identifiers for a query is a
>>potentially good one, and possibly even a function that
>>returns the number of matches for a query.
>>- This could of course be done with a single query interface
>>function but with a slightly extended RQL
> 
> 
> Perhaps a flag indicating whether to return 'documents', 'identifiers' or
> 'count' on the query?
> 
> T.
> 
> 
>>-----Original Message-----
>>From: owner-registry at eso.org [mailto:owner-registry at eso.org]
>>On Behalf Of Paul Harrison
>>Sent: 14 April 2005 08:15
>>To: Ray Plante
>>Cc: Registry List
>>Subject: Re: New helper query interface method
>>
>>Ray Plante wrote:
>>
>>>Hi,
>>>
>>>
>>>
>>>>GetResource
>>>
>>>
>>>I think it would be good to have an explicit identifier resolver
>>>function, even though this is possible directly with the
>>
>>constraint-based search.
>>
>>>(In fact, we should define it as being equivalient to a search with
>>>the constraint "identifier='{ivo-id}'".)  An immediate use for this
>>>would be to check that an authority ID is not already registered;
>>>however, I can imagine other applications using this.
>>>
>>>On Wed, 13 Apr 2005, Matthew J. Graham wrote:
>>>
>>>
>>>>But this is exactly the same as the OAI GetRecord method?
>>>
>>>
>>>The proposal is to make it specifically part of the Search
>>
>>interface
>>
>>>(which should be independent of the Harvesting interface).
>>>
>>>cheers,
>>>Ray
>>>
>>
>>It would please me! -the majority of the queries that I want
>>to make are of this form, and it would save having to create
>>adql for the purpose....
>>
>>I also think that Yuji Shirasaki's idea of having a search
>>that returns a list of identifiers for a query is a
>>potentially good one, and possibly even a function that
>>returns the number of matches for a query.
>>- This could of course be done with a single query interface
>>function but with a slightly extended RQL
>>
>>Regards,
>>	Paul.
>>
>>--
>>Paul Harrison
>>ESO Garching
>>www.eso.org
>>
> 
> 
> 
> 


-- 
Paul Harrison
ESO Garching
www.eso.org