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From "Tom Hill (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-2636) Explain doesn't deal with negative only queries completely correctly
Date Tue, 05 Jul 2011 20:42:16 GMT

     [ https://issues.apache.org/jira/browse/SOLR-2636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tom Hill updated SOLR-2636:
---------------------------

    Attachment: SOLR-2636

Trivial patch which just fixes the call to explain.

> Explain doesn't deal with negative only queries completely correctly
> --------------------------------------------------------------------
>
>                 Key: SOLR-2636
>                 URL: https://issues.apache.org/jira/browse/SOLR-2636
>             Project: Solr
>          Issue Type: Bug
>          Components: search
>    Affects Versions: 3.2
>            Reporter: Tom Hill
>            Priority: Trivial
>         Attachments: SOLR-2636
>
>
> If you do a negative only query, such as -author:[* TO *], explain returns NaN for the
score. The query executes correctly, however.
> To execute negative only queries, Solr calls QueryUtils.makeQueryable, and everything
works correctly. But explain doesn't call this, and coord ends up dividing by zero.
> One could fix this by fixing the call to explain, which is easy, or perhaps by fixing
the query parser to generate the query that way in the first place. (It looks like extended
dismax does the latter, and so shouldn't have problems).

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