[ http://issues.apache.org/jira/browse/LUCENE-553?page=all ]

Chuck Williams updated LUCENE-553:
----------------------------------

    Attachment: MultiFieldDisjunctionMaxQueryParserTest.java

> MultiFieldDisjunctionMaxQueryParser
> -----------------------------------
>
>          Key: LUCENE-553
>          URL: http://issues.apache.org/jira/browse/LUCENE-553
>      Project: Lucene - Java
>         Type: New Feature

>   Components: QueryParser
>     Versions: 1.9, 2.0
>  Environment: All
>     Reporter: Chuck Williams
>  Attachments: MultiFieldDisjunctionMaxQueryParser.java, 
> MultiFieldDisjunctionMaxQueryParserTest.java
>
> Following on from Lucene-323, here is a replacement for the old 
> DistributingMultiFieldQueryParser that works with the new QueryParser.  This 
> is essentially a cut-and-paste of MultiFieldQueryParser, using 
> DisjunctionMaxQuery instead of BooleanQuery as the combing operator for the 
> expansion of query terms across the multiple fields being searched.  This is 
> an important adjunct to DisjunctionMaxQuery as it provides a way to generate 
> this query from input query strings.
> It would be possible to generalize MultiFieldQueryParser to parameterize the 
> combining operator, but this would require modifying it rather than simply 
> adding a new class.

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