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https://issues.apache.org/jira/browse/LUCENE-8007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16235677#comment-16235677
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Robert Muir commented on LUCENE-8007:
-------------------------------------
I think there may be some stuff like:
{code}
if (sumTotalTermFreq != 0) {
// leniency that hid a bug in simpletext that i had
}
{code}
Also i am not sure all stats relations are really checked there (e.g. docCount
<= sumDocFreq <= sumTotalTermFreq), including ensuring that
docFreq=totalTermFreq and sumDocFreq=sumTotalTermFreq always in the
DOCS_ONLY_CASE and so on.
> Require that codecs always store totalTermFreq, sumDocFreq and
> sumTotalTermFreq
> -------------------------------------------------------------------------------
>
> Key: LUCENE-8007
> URL: https://issues.apache.org/jira/browse/LUCENE-8007
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Major
> Fix For: master (8.0)
>
> Attachments: LUCENE-8007.patch, LUCENE-8007.patch, LUCENE-8007.patch,
> LUCENE-8007.patch
>
>
> Javadocs allow codecs to not store some index statistics. Given discussion
> that occurred on LUCENE-4100, this was mostly implemented this way to support
> pre-flex codecs. We should now require that all codecs store these statistics.
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