[jira] Commented: (LUCENE-958) MultiSearcher Filtering with more than one index is broken

["Yonik Seeley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12512610 ] 

Yonik Seeley commented on LUCENE-958:
-------------------------------------

Actually, I retract that I think it's broken.
Filter.getBits() will be called for each sub-index, so a new BitSet should be returned specific to each sub-index.   Having a Filter implementation that returns the same BitSet for each sub index is incorrect.


> MultiSearcher Filtering with more than one index is broken
> ----------------------------------------------------------
>
>                 Key: LUCENE-958
>                 URL: https://issues.apache.org/jira/browse/LUCENE-958
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Search
>    Affects Versions: 2.2
>            Reporter: Ion Badita
>
> Using filtering on MultiSarcher with more than one index is not working right.
> Probable the best way to describe the problem is to give a small example:
> Suppose we have 2 Indexes with two documents each:
> Index1 {Doc(id:"A", content:".."), Doc(id:"B", content:"..")}
> Index2 {Doc(id:"C", content:".."), Doc(id:"D", content:"..")}
> When executing a query that returns all the documents and applying a QueryFilter that generated the following BitSet (1, 0, 0, 0), it should filter all the documents but first; the real results are: Doc(id:"A") and Doc(id:"B"), this because the MultiSearcher applies the BitSet filter from the bitset's position 0 for each Index.
> The right way is to split the bitset in peaces: Index1 to get the bites form 0-1 and Index2 bites from 2-3.

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