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Date: Thu, 25 Aug 2011 02:42:29 +0000 (UTC)
From: "Robert Muir (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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Subject: [jira] [Updated] (LUCENE-3401) need to ensure that sims that use
 collection-level stats (e.g. sumTotalTermFreq) handle non-existent field
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     [ https://issues.apache.org/jira/browse/LUCENE-3401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-3401:
--------------------------------

    Attachment: LUCENE-3401.patch

here's test with fix to SimilarityBase.

I tried to rearrange this in a way that its not confusing.

> need to ensure that sims that use collection-level stats (e.g. sumTotalTermFreq) handle non-existent field
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-3401
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3401
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: flexscoring branch
>            Reporter: Robert Muir
>         Attachments: LUCENE-3401.patch
>
>
> Because of things like queryNorm, unfortunately similarities have to handle the case where they are asked to computeStats() for a term, where the field does not exist at all.
> (Note they will never have to actually score anything, but unless we break how queryNorm works for TFIDF, we have to deal with this case).
> I noticed this while doing some benchmarking, so i created a test to test some cases like this across all the sims.

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