Re: [bdbxml] A question about indices in Berkeley XML DB

Leon,

In BDB XML 2.1.8 or earlier, indexes do not help queries that
work against only a single document.  Depending on the size
of the document and the nature of the queries, your performance
may still be acceptable if you use a NodeStorage container.

The upcoming 2.2 release changes that, so that the query processor
will use node indexes (DBXML_INDEX_NODES flag to container creation)
to better optimize queries within documents.

Your next question is likely to be "when is 2.2 releasing?"
It is nearly done, but I cannot commit to a date :-)

Regards,

George

> Hi,
>  I have a question with regard to the using of indices in Berkeley  
> XML DB.
>  Are the indices used to index the documents in a container?
>  If yes, can they be used to index a single document in a container  
> (e.g. index an element or attribute value)?
>  For example, I put a large xml document to a container and try to  
> query some nodes with this document.
>  How should I use indices for this scenario?
>
>  Thanks
>
> Leon
>
>
>



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