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Posted to dev@lucene.apache.org by "Greg Pendlebury (JIRA)" <ji...@apache.org> on 2015/12/03 22:32:11 UTC
[jira] [Comment Edited] (SOLR-2649) MM ignored in edismax queries
with operators
[ https://issues.apache.org/jira/browse/SOLR-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038626#comment-15038626 ]
Greg Pendlebury edited comment on SOLR-2649 at 12/3/15 9:31 PM:
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I tried Jan's patch, and (whilst it is technically correct) it did not improve the usefulness of edismax without also addressing how q.op is handled. We continued to see absurd search results that failed UAT.
The combined patch with both has been on our prod servers since May 2014 without any problems, but I have not heard any feedback from others that might have tried it. The corpus is nearly 200 million fulltext newspaper articles: http://trove.nla.gov.au/newspaper/result?q=
was (Author: gpendleb):
I tried Jan's patch, and (whilst it is technically correct) it did not improve the usefulness of edismax without also addressing how q.op is handled. We continued to see absurd search results that failed UAT.
The combined patch with both has been on our prod servers since May 2014 without any problems, but I have not heard any feedback from others that might have tried it. The corpus is nearly 200 million fulltext newspapers: http://trove.nla.gov.au/newspaper/result?q=
> MM ignored in edismax queries with operators
> --------------------------------------------
>
> Key: SOLR-2649
> URL: https://issues.apache.org/jira/browse/SOLR-2649
> Project: Solr
> Issue Type: Improvement
> Components: query parsers
> Reporter: Magnus Bergmark
> Assignee: Erick Erickson
> Fix For: 4.9, Trunk
>
> Attachments: SOLR-2649-with-Qop.patch, SOLR-2649-with-Qop.patch, SOLR-2649.diff, SOLR-2649.patch
>
>
> 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.
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