lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eric Pugh (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1889) Change default value of 'mm' param to depend on explicit/implicit value of q.op
Date Thu, 22 Apr 2010 19:44:49 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12859977#action_12859977
] 

Eric Pugh commented on SOLR-1889:
---------------------------------

Recently ran into this where the 'mm' was forcing perfect matches, and leading to the standard
parser being great, but dismax being terrible!   

> Change default value of 'mm' param to depend on explicit/implicit value of q.op
> -------------------------------------------------------------------------------
>
>                 Key: SOLR-1889
>                 URL: https://issues.apache.org/jira/browse/SOLR-1889
>             Project: Solr
>          Issue Type: Improvement
>          Components: search
>            Reporter: Hoss Man
>             Fix For: 1.5
>
>
> The 'mm' param for the dismax parser has always defaulted to 100%, but many first time
users seem to expect that the default behavior of dismax should work similar to the standard
QParser, and be influenced by the schema configured default query op, or the q.op query param.
> we should change the default value for "mm" to be equivalent to 100% if the derived value
of "q.op" would be AND, and to be 1 if the derived value of "q.op" would be OR.  We should
document this in CHANGES.txt so people who are upgrading know that if they have q.op=OR, but
they still want a default mm value of 100%, they should add it as a configured default for
their request handlers.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


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


Mime
View raw message