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Posted to dev@lucene.apache.org by "Adrien Grand (JIRA)" <ji...@apache.org> on 2015/11/13 21:56:11 UTC
[jira] [Resolved] (LUCENE-6276) Add matchCost() api to
TwoPhaseDocIdSetIterator
[ https://issues.apache.org/jira/browse/LUCENE-6276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Adrien Grand resolved LUCENE-6276.
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Resolution: Fixed
Fix Version/s: 5.4
I just committed the changes. Thanks Paul!
> Add matchCost() api to TwoPhaseDocIdSetIterator
> -----------------------------------------------
>
> Key: LUCENE-6276
> URL: https://issues.apache.org/jira/browse/LUCENE-6276
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Robert Muir
> Fix For: 5.4
>
> Attachments: LUCENE-6276-ExactPhraseOnly.patch, LUCENE-6276-NoSpans.patch, LUCENE-6276-NoSpans2.patch, LUCENE-6276.patch, LUCENE-6276.patch, LUCENE-6276.patch, LUCENE-6276.patch, LUCENE-6276.patch, LUCENE-6276.patch, LUCENE-6276.patch, LUCENE-6276.patch
>
>
> We could add a method like TwoPhaseDISI.matchCost() defined as something like estimate of nanoseconds or similar.
> ConjunctionScorer could use this method to sort its 'twoPhaseIterators' array so that cheaper ones are called first. Today it has no idea if one scorer is a simple phrase scorer on a short field vs another that might do some geo calculation or more expensive stuff.
> PhraseScorers could implement this based on index statistics (e.g. totalTermFreq/maxDoc)
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