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From "David Smiley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-7219) Access filter cache from lucene query syntax
Date Mon, 10 Aug 2015 04:15:45 GMT

    [ https://issues.apache.org/jira/browse/SOLR-7219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14679539#comment-14679539
] 

David Smiley commented on SOLR-7219:
------------------------------------

Just curious; why is this feature implemented as a change to the query grammar versus adding
a QParser?  I suppose the grammar change might be nicer looking -- which is subjective.  Another
approach could have been a special local param (e.g. cache=true) on top of any QParser.

> Access filter cache from lucene query syntax
> --------------------------------------------
>
>                 Key: SOLR-7219
>                 URL: https://issues.apache.org/jira/browse/SOLR-7219
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Yonik Seeley
>            Assignee: Yonik Seeley
>             Fix For: 5.4
>
>         Attachments: SOLR-7219.patch
>
>
> A filter query retrieves a set of documents matching a query from the filter cache. Since
scores are not cached, all documents that match the filter produce the same score. Cached
filters will be extremely fast when they are used again in another query.
> Filter Query Example:
> {code}
> description:HDTV OR filter(+promotion:tv +promotion_date:[NOW/DAY-7DAYS TO NOW/DAY+1DAY])
> {code}
> The power of the filter() syntax is that it may be used anywhere within a lucene/solr
query syntax. Normal fq support is limited to top-level conjunctions. 



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