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https://issues.apache.org/jira/browse/SOLR-7219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14996811#comment-14996811
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Alexandre Rafalovitch commented on SOLR-7219:
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Does this allow to OR the filter queries efficiently? That was always the
limitation of **fq** that you could only effectively AND them.
If it does, we should document that rather prominently to make people happy.
> 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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