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From Jan Høydahl (JIRA) <>
Subject [jira] Commented: (SOLR-756) Make DisjunctionMaxQueryParser generally useful by supporting all query types.
Date Tue, 15 Feb 2011 12:15:58 GMT


Jan Høydahl commented on SOLR-756:

I think this issue can be closed as it duplicates SOLR-1553, not?

> Make DisjunctionMaxQueryParser generally useful by supporting all query types.
> ------------------------------------------------------------------------------
>                 Key: SOLR-756
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 1.3
>            Reporter: David Smiley
>             Fix For: Next
>         Attachments: SolrPluginUtilsDisMax.patch
> This is an enhancement to the DisjunctionMaxQueryParser to work on all the query variants
such as wildcard, prefix, and fuzzy queries, and to support working in "AND" scenarios that
are not processed by the min-should-match DisMax QParser. This was not in Solr already because
DisMax was only used for a very limited syntax that didn't use those features. In my opinion,
this makes a more suitable base parser for general use because unlike the Lucene/Solr parser,
this one supports multiple default fields whereas other ones (say Yonik's {!prefix} one for
example, can't do dismax). The notion of a single default field is antiquated and a technical
under-the-hood detail of Lucene that I think Solr should shield the user from by on-the-fly
using a DisMax when multiple fields are used. 
> (patch to be attached soon)

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