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From "Mark Miller (JIRA)" <>
Subject [jira] Commented: (LUCENE-1821) Weight.scorer() not passed doc offset for "sub reader"
Date Tue, 18 Aug 2009 21:13:14 GMT


Mark Miller commented on LUCENE-1821:

Can you give a use example? What are you caching in the Scorer index wide? It really seems
you should be doing it per segment ...

> Weight.scorer() not passed doc offset for "sub reader"
> ------------------------------------------------------
>                 Key: LUCENE-1821
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Search
>    Affects Versions: 2.9
>            Reporter: Tim Smith
> Now that searching is done on a per segment basis, there is no way for a Scorer to know
the "actual" doc id for the document's it matches (only the relative doc offset into the segment)
> If using caches in your scorer that are based on the "entire" index (all segments), there
is now no way to index into them properly from inside a Scorer because the scorer is not passed
the needed offset to calculate the "real" docid
> suggest having Weight.scorer() method also take a integer for the doc offset
> Abstract Weight class should have a constructor that takes this offset as well as a method
to get the offset
> All Weights that have "sub" weights must pass this offset down to created "sub" weights

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