[jira] [Commented] (SOLR-2649) MM ignored in edismax queries with operators

["Shawn Heisey (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13554489#comment-13554489 ] 

Shawn Heisey commented on SOLR-2649:
------------------------------------

Just ran into this (or something like it) on both my production 3.5 and dev 4.1 servers.

What I see happening with edismax queries that contain operators is this: Both mm (100%) and q.op (AND) are ignored so that it acts as if q.op were OR.  Instead of 8k results, there are over 300k.  With a sort parameter, most of the results actually seen are invalid.  Here is an actual query from my log:

(  (young man close up NOT woman NOT couple))

                
> MM ignored in edismax queries with operators
> --------------------------------------------
>
>                 Key: SOLR-2649
>                 URL: https://issues.apache.org/jira/browse/SOLR-2649
>             Project: Solr
>          Issue Type: Bug
>          Components: query parsers
>            Reporter: Magnus Bergmark
>            Priority: Minor
>             Fix For: 4.2, 5.0
>
>
> Hypothetical scenario:
>   1. User searches for "stocks oil gold" with MM set to "50%"
>   2. User adds "-stockings" to the query: "stocks oil gold -stockings"
>   3. User gets no hits since MM was ignored and all terms where AND-ed together
> The behavior seems to be intentional, although the reason why is never explained:
>   // For correct lucene queries, turn off mm processing if there
>   // were explicit operators (except for AND).
>   boolean doMinMatched = (numOR + numNOT + numPluses + numMinuses) == 0; 
> (lines 232-234 taken from tags/lucene_solr_3_3/solr/src/java/org/apache/solr/search/ExtendedDismaxQParserPlugin.java)
> This makes edismax unsuitable as an replacement to dismax; mm is one of the primary features of dismax.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org