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https://issues.apache.org/jira/browse/SOLR-1632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13195619#comment-13195619
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Yonik Seeley commented on SOLR-1632:
------------------------------------
bq. There is nothing different from a MTQ generated BQ than a huge BQ a solr
user submits.
Multi-term queries like range query, prefix query, etc, do not depend on term
stats, and can consist of millions of terms. It's a waste to attempt to return
term stats for them (estimated or not).
It would also be a shame to use estimates rather than exact numbers for what
will be the common case (i.e. when there's really only a couple of terms you
need stats for):
+title:"blue whale" +title_whole:[a TO g}
or
+title:"blue whale" +date:[2001-01-01 TO 2010-01-01}
Ideally, we wouldn't even do a rewrite in order to collect terms - rewrite
itself has gotten much more expensive in some circumstances (i.e. iterating the
first 350 terms to determine what style of rewrite should be used)
> Distributed IDF
> ---------------
>
> Key: SOLR-1632
> URL: https://issues.apache.org/jira/browse/SOLR-1632
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 1.5
> Reporter: Andrzej Bialecki
> Attachments: 3x_SOLR-1632_doesntwork.patch, SOLR-1632.patch,
> SOLR-1632.patch, SOLR-1632.patch, distrib-2.patch, distrib.patch
>
>
> Distributed IDF is a valuable enhancement for distributed search across
> non-uniform shards. This issue tracks the proposed implementation of an API
> to support this functionality in Solr.
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