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From "Robert Muir (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3593) Add a filter returning all document without a value in a field
Date Thu, 24 Nov 2011 22:30:40 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156918#comment-13156918
] 

Robert Muir commented on LUCENE-3593:
-------------------------------------

Hello,

I think rather than having NoFieldValueFilter with boolean negate, we should instead use a
positive name for the filter, to avoid requiring double negations.

So the name would something positive like FieldValueFilter instead.

                
> Add a filter returning all document without a value in a field
> --------------------------------------------------------------
>
>                 Key: LUCENE-3593
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3593
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: core/search
>    Affects Versions: 3.6, 4.0
>            Reporter: Simon Willnauer
>             Fix For: 3.6, 4.0
>
>         Attachments: LUCENE-3593.patch
>
>
> In some situations it would be useful to have a Filter that simply returns all document
that either have at least one or no value in a certain field. We don't have something like
that out of the box and adding it seems straight forward.

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