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From Guangwei Yuan <guy...@gmail.com>
Subject Re: Disable coord
Date Thu, 19 Nov 2009 06:07:35 GMT
Thanks for your reply.  Nested boolean queries is a valid concern.  I also
realized that isCoordDisabled needs to be considered in
BooleanQuery.hashCode so that a query with coord=false will have a different
cache key in Solr.

On Thu, Nov 12, 2009 at 12:12 PM, Chris Hostetter
<hossman_lucene@fucit.org>wrote:

>
> : I want to disable coord for certain queries.  For example, if I pass a
> URL
> : parameter like "disableCoord" to Solr, the BooleanQuery generated will
> have
> : coord disabled.  If it's not currently supported, what would be a good
> way
> : to implement it?
>
> in order to have something like this on a per query basis it needs to be
> handled by the query parsers.  the Lucene QueryParser doesn't provide any
> syntax markup to do this, so you would have to add your own -- you could
> subclass the LuceneQParserPlugin and just have it *always* ignore the cord
> if some query param coord=false was set, but you'd have to be careful
> about wether that's really what you want in a deeply nested set of boolean
> queries -- ie:   (A +B -C +(D E F G H) ((X Y Z) (L M (N O P)))) ... what
> if you only want to disable the coord on the (X Y Z) boolean query?
>
> :
> : Thanks,
> : Guangwei
> :
>
>
>
> -Hoss
>
>

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