Hi France, 

that’s just a wild guess, but maybe the index:facets() might be of help here?
It works directly on the index information, so the queries should be 
sufficiently fast if the results of index:facets() fulfill your needs.

http://docs.basex.org/wiki/Index_Module#index:facets


The idea of db:attribute-values() is an idea worth discussing as well.

Best from Konstanz

Michael



> Am 12.06.2019 um 09:07 schrieb France Baril <france.ba...@architextus.com>:
> 
> Hi, 
> 
> I have been implementing more queries that use the attribute indexes lately. 
> However a lot of my queries require getting values to offer selectable items 
> in user forms (GUI). I have not found a good way to do that.
> 
> For example, I tried changing : 
>   let $account-types := distinct-values(db:open($db-name)//account/@type)
> to 
>   let $account-types := distinct-values(db:attribute-range($db-name, 'a', 
> 'zzzzzzzzzz', 'type')[parent::*/name() = 'account'])
> 
> I looked for a function that would be more like 
>   let $account-types := db:attribute-values($db-name, 
> 'type')[parent::*/name() = 'account]
> 
> I'm not getting any performance improvements with the db:attribute-range 
> compared to the regular db:open($db-name). and I am assuming that the issue 
> is that since I provide a range, it has to check every value individually as 
> opposed to just grabbing everything in the named attribute.
> 
> Any chance we can get values at some point? Or do you have a suggestion to 
> improve this type of query?
> 
> 
> 
> 
> -- 
> France Baril
> Architecte documentaire / Documentation architect
> france.ba...@architextus.com <mailto:france.ba...@architextus.com>

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