[jira] [Updated] (LUCENE-5429) Run one search across multiple scorers/collectors

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless updated LUCENE-5429:
---------------------------------------

    Attachment: LUCENE-5429.patch

Patch, making a Similarity that switches between sub-Sims, and a custom collector that uses that switching and calls .score() and then collects into multiple sub-Collectors.

While this works for TermQuery, and all-MUST BooleanQuery, the test fails on all-SHOULD BooleanQuery because DisjunctionSum/MaxScorer pre-compute the score during matching.  I know they do this for performance reasons (single pass recursion through the PQ to find the sub-scorers that matched)... so I think the only way this feature can work in general is with a custom BQ that doesn't do this opto.

> Run one search across multiple scorers/collectors
> -------------------------------------------------
>
>                 Key: LUCENE-5429
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5429
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>         Attachments: LUCENE-5429.patch
>
>
> I'm looking into the possibility of running the same search across many scorers, so that decoding postings lists / doing union and intersect are done once, but scoring via Similarity can be done multiple times for each it (and the results collected into separate collectors).



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