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https://issues.apache.org/jira/browse/LUCENE-5074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13691527#comment-13691527
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Mike Sokolov commented on LUCENE-5074:
--------------------------------------

Uwe, I believe RangeFilterBuilder already handles null ends.  I have various 
other local mods that I could submit if there is interest: RangeQueryBuilder 
seems to be missing?  Also I have a RegexpQueryBuilder I could contribute.  In 
the interests of consistency, I'm including similar null-accepting patches for 
NumericRangeFilterBuilder (exactly like QueryBuilder), but I haven't added 
RangeQueryBuilder or RegexpQueryBuilder here - seems like a separate issue.
 
                
> Support open-ended NumericRangeQuery in XmlQueryParser
> ------------------------------------------------------
>
>                 Key: LUCENE-5074
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5074
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/queryparser
>            Reporter: Mike Sokolov
>         Attachments: LUCENE-5074.patch
>
>
> There is no way to specify an open-ended numeric range query using the XML 
> query parser syntax.  To be consistent with the usage in the 
> NumericRangeQuery API, which accepts <code>null</code> as an indicator of a 
> missing range endpoint, I propose interpreting an empty or missing 
> <code>lower</code> or <code>upper</code> attribute in the XML syntax in the 
> same way.

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