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From "Shay Banon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3282) BlockJoinQuery: Allow to add a custom child collector, and customize the parent bitset extraction
Date Fri, 29 Jul 2011 19:00:10 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13072979#comment-13072979
] 

Shay Banon commented on LUCENE-3282:
------------------------------------

Hi, sorry for the late response, I the comment.

Yea, I agree that there will be false positives, but thats the idea of it (sometimes you want
to run facets for example on "sub queries"). Btw, I got your point on advance, do you think
if a collector exists, then advance should be implemented by iterating over all docs up to
the provided doc to advance to.

Regarding the wrapper, interesting!. I need to have a look at how to generalize it, but it
should be simple, I think, I'll try and work on it.

> BlockJoinQuery: Allow to add a custom child collector, and customize the parent bitset
extraction
> -------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-3282
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3282
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/search
>    Affects Versions: 3.4, 4.0
>            Reporter: Shay Banon
>         Attachments: LUCENE-3282.patch, LUCENE-3282.patch
>
>
> It would be nice to allow to add a custom child collector to the BlockJoinQuery to be
called on every matching doc (so we can do things with it, like counts and such). Also, allow
to extend BlockJoinQuery to have a custom code that converts the filter bitset to an OpenBitSet.

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