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From "David Smiley (JIRA)" <>
Subject [jira] Commented: (SOLR-756) Make DisjunctionMaxQueryParser generally useful by supporting all query types.
Date Wed, 16 Feb 2011 23:03:24 GMT


David Smiley commented on SOLR-756:

Jan, you refer to the Extended Dismax QParser -- and the answer is no.  I think you intended
to comment on SOLR-758.  This patch here, as I said in a comment above here
only has to do with a specific improvement to, that is an enabler for
other improvements to DismaxQParser. According to Hoss, I need to add tests for this issue.

> 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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