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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-4273) Fix DocsEnum freq flag consistent with DocsAndPositionsEnum flags
Date Tue, 31 Jul 2012 16:07:34 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-4273?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Muir resolved LUCENE-4273.
---------------------------------

       Resolution: Fixed
    Fix Version/s: 5.0
    
> Fix DocsEnum freq flag consistent with DocsAndPositionsEnum flags
> -----------------------------------------------------------------
>
>                 Key: LUCENE-4273
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4273
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>             Fix For: 4.0, 5.0
>
>         Attachments: LUCENE-4273.patch, LUCENE-4273.patch, LUCENE-4273.patch
>
>
> Followup from LUCENE-4230
> Currently today to pull freq() from a docsEnum, you have to pass a boolean 'needsFreqs=true'.
If the field omitsTF, then it returns null (and you need to call it again, with 'needsFreqs=false',
in which case you are not supposed to call freq().
> We fixed this in D&PEnum in 4230: as you can tell from the fieldinfos whether they
are there or not, there is no need to return null, it makes consumer code complicated.
> So this issue is just to have docs(Bits, reuse) which calls docs(Bits, reuse, FLAG_FREQS)
by default. if they arent there, the docsenum returns 1 for freq(). 
> So calling docs(Bits, reuse, 0) is just an optimization hint to the codec that you never
need them (same as the payload/offset flags for docsAndPositions)

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