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https://issues.apache.org/jira/browse/LUCENE-2110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12786717#action_12786717
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Uwe Schindler commented on LUCENE-2110:
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I forgot: Thank you all, Mike, Robert, Mark for all your suggestions in chat!
> Refactoring of FilteredTermsEnum and MultiTermQuery
> ---------------------------------------------------
>
> Key: LUCENE-2110
> URL: https://issues.apache.org/jira/browse/LUCENE-2110
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Affects Versions: Flex Branch
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: Flex Branch
>
> Attachments: LUCENE-2110.patch, LUCENE-2110.patch, LUCENE-2110.patch,
> LUCENE-2110.patch, LUCENE-2110.patch, LUCENE-2110.patch
>
>
> FilteredTermsEnum is confusing as it is initially positioned to the first
> term. It should instead work like an uninitialized TermsEnum for a field
> before the first call to next() or seek().
> FilteredTermsEnums cannot implement seek() as eg. NRQ or Automaton are not
> able to support this. Seeking is also not needed for MTQ at all, so seek can
> just throw UOE.
> This issue changes some of the internal behaviour of MTQ and
> FilteredTermsEnum to allow also seeking in NRQ and Automaton (see comments
> below).
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