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From Nicolas Lalevée (JIRA) <>
Subject [jira] Commented: (LUCENE-958) MultiSearcher Filtering with more than one index is broken
Date Mon, 16 Jul 2007 10:00:04 GMT


Nicolas Lalevée commented on LUCENE-958:

I had the same feeling as you Ion because we both generate the filter's bitset outside of
the filter itself, assuming that the filter will always be used with the correct IndexReader.

But as pointed by Yonik, the Filter API expect the filter to give a bitset corresponding to
provided reader. So the API actually is consistent.

> MultiSearcher Filtering with more than one index is broken
> ----------------------------------------------------------
>                 Key: LUCENE-958
>                 URL:
>             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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