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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (LUCENE-4607) Add estimateDocCount to DocIdSetIterator
Date Thu, 14 Mar 2013 18:38:12 GMT


Robert Muir commented on LUCENE-4607:

I'll put it in when committing...I always wait until then, otherwise its just asking for conflicts
if you ever merge up the patch :)
> Add estimateDocCount to DocIdSetIterator
> ----------------------------------------
>                 Key: LUCENE-4607
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/search
>    Affects Versions: 4.0
>            Reporter: Simon Willnauer
>             Fix For: 4.3
>         Attachments: LUCENE-4607.patch, LUCENE-4607.patch
> this is essentially a spinnoff from LUCENE-4236
> We currently have no way to make any decsision on how costly a DISI is neither when we
apply filters nor when we build conjunctions in BQ. Yet we have most of the information already
and can easily expose them via a cost API such that BS and FilteredQuery can apply optimizations
on per segment basis.

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