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https://issues.apache.org/jira/browse/LUCENE-958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12512706
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Nicolas Lalevée commented on LUCENE-958:
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I don't understand the invalid status of this issue. If the filter provided to
the multisearcher have to implement itself the document offset handling, then
there an API issue : MultiSearcher implements Searchable.
> 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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