return only latest version of an item

[A. Steven Anderson]

>
> Which must be a bug. saxon returns a different result.
>

Perhaps, or I've lost something in translation from my simplified example.


>  Using distinct-values to group by id could be another option, though maybe
> not the fastest:
>
> for $id in distinct-values(/items//id)
> let $itemsById := /items/item[id = $id]
> return
>    $itemsById[version = max($itemsById/version)]
>
> You should have an index on id and version in any case.
>

This worked!  It's twice as fast as my original convoluted solution.

Many thanks to all who responded!!

-- 
A. Steven Anderson
Independent Consultant
http://x-query.com/mailman/listinfo/talk
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