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Posted to dev@lucene.apache.org by "Martijn van Groningen (JIRA)" <ji...@apache.org> on 2013/10/01 10:45:29 UTC

[jira] [Updated] (LUCENE-5225) ToParentBlockJoinQuery don't accumulate the child doc ids and scores if ToParentBlockJoinCollector is not used

     [ https://issues.apache.org/jira/browse/LUCENE-5225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martijn van Groningen updated LUCENE-5225:
------------------------------------------

    Fix Version/s: 4.6
                   5.0

> ToParentBlockJoinQuery don't accumulate the child doc ids and scores if ToParentBlockJoinCollector is not used
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-5225
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5225
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Martijn van Groningen
>            Assignee: Martijn van Groningen
>            Priority: Minor
>             Fix For: 5.0, 4.6
>
>         Attachments: LUCENE-5225.patch, LUCENE-5225.patch
>
>
> The BlockJoinScorer temporarily saves the child docids and scores in two arrays (pendingChildDocs/pendingChildScores) for the current block (parent/child docs) being processed. This is only need for ToParentBlockJoinCollector and in the case that this collector isn't used then these two arrays shouldn't be used as well.
> I've seen cases where only the ToParentBlockJoinQuery is used and there are many child docs (100k and up), in that case these two arrays are a waste of resources.



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