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https://issues.apache.org/jira/browse/LUCENE-4258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13424870#comment-13424870
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Robert Muir commented on LUCENE-4258:
-------------------------------------
{quote}
I don't see how UPDATE_FIELDS can do so unless we somehow save the raw
stats (FieldInvertState) in the index. It seems like UPDATE_FIELDS
should forever be limited to DOCS_ONLY, no norms updating?
{quote}
Actually its DOCS_ONLY plus OMIT_NORMS.
Anyway why not start with updating the entire contents of a field as I
suggested?
It seems to be the most general solution, and there is some discussion about
how scoring can
work correctly on LUCENE-3837 (the stats, not just norms).
{quote}
I do think this is a common use case (ACLs, filters, social
tags)... though I'm not sure how bad it'd really be in practice for
the app to simply REPLACE_FIELDS with the full set of tags. I guess
if we build REPLACE_FIELDS first we can test that.
{quote}
This is why we should do 'replace contents of a field' first. Its the most
well-defined and general.
Its also still controversial, myself I'm not convinced it will actually help
most people that think
they want it, I think it will just slow down searches.
> Incremental Field Updates through Stacked Segments
> --------------------------------------------------
>
> Key: LUCENE-4258
> URL: https://issues.apache.org/jira/browse/LUCENE-4258
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/index
> Reporter: Sivan Yogev
> Original Estimate: 2,520h
> Remaining Estimate: 2,520h
>
> Shai and I would like to start working on the proposal to Incremental Field
> Updates outlined here (http://markmail.org/message/zhrdxxpfk6qvdaex).
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