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From "Mikhail Khludnev (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-7863) Don't repeat postings (and perhaps positions) on ReverseWF, EdgeNGram, etc
Date Sun, 20 Aug 2017 19:58:01 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-7863?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mikhail Khludnev updated LUCENE-7863:
-------------------------------------
    Attachment: LUCENE-7863.patch

WIP [^LUCENE-7863.patch]
It introduces a codec with two posting formats:
# hijacking PF which stores posting offsets for original terms
# injecting PF which reverses terms and supplies offset to the original terms postings (here
is the only file format is changed - it's written with Zlong since these offset deltas are
negative)
It has to break into any private and final members that blow up the patch.

> Don't repeat postings (and perhaps positions) on ReverseWF, EdgeNGram, etc  
> ----------------------------------------------------------------------------
>
>                 Key: LUCENE-7863
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7863
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/index
>            Reporter: Mikhail Khludnev
>         Attachments: LUCENE-7863.hazard, LUCENE-7863.patch
>
>
> h2. Context
> \*suffix and \*infix\* searches on large indexes. 
> h2. Problem
> Obviously applying {{ReversedWildcardFilter}} doubles an index size, and I'm shuddering
to think about EdgeNGrams...
> h2. Proposal 
> _DRY_



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