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https://issues.apache.org/jira/browse/SOLR-10046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15875735#comment-15875735
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Christine Poerschke commented on SOLR-10046:
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Hi Keith,
I've committed the addition of the OneMergeWrappingMergePolicy class in
LUCENE-7688 yesterday and so then here the next steps would probably be to:
* merge master into the _create-uninvert-docvalues-merge-policy_ working branch
* add the missing javadocs (TODOs)
* check that {{ant precommit}} passes (LUCENE-7689 had turned out to be a
missing javadocs issue)
I won't have bandwidth for the above steps this week i.e. feel free to go ahead
if you have time. Thanks.
> Create UninvertDocValuesMergePolicy
> -----------------------------------
>
> Key: SOLR-10046
> URL: https://issues.apache.org/jira/browse/SOLR-10046
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Keith Laban
>
> Create a merge policy that can detect schema changes and use
> UninvertingReader to uninvert fields and write docvalues into merged segments
> when a field has docvalues enabled.
> The current behavior is to write null values in the merged segment which can
> lead to data integrity problems when sorting or faceting pending a full
> reindex.
> With this patch it would still be recommended to reindex when adding
> docvalues for performance reasons, as it not guarenteed all segments will be
> merged with docvalues turned on.
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