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Uwe Schindler commented on LUCENE-4607: --------------------------------------- Nice idea! At least the FilteredQuery code looks fine to me. I agree, the Bits interface and FixedBitSet has a costly cardinality (Bits does not have it at all...), so we should think about that. As far as I see it returns maxDoc as cost. > Add estimateDocCount to DocIdSetIterator > ---------------------------------------- > > Key: LUCENE-4607 > URL: https://issues.apache.org/jira/browse/LUCENE-4607 > Project: Lucene - Core > Issue Type: Bug > Components: core/search > Affects Versions: 4.0 > Reporter: Simon Willnauer > Fix For: 4.1, 5.0 > > Attachments: 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org