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https://issues.apache.org/jira/browse/LUCENE-8200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16396691#comment-16396691
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Simon Willnauer commented on LUCENE-8200:
-----------------------------------------

thanks [~mikemccand] I attached a new patch. I am aiming to push this tomorrow 
unless anybody objects. One think that I realized is that we can't utilize this 
for index sorting since fields that participate in the sort can't be updated. 
But I think that is not a major issue. //cc [~rcmuir]

>  Allow doc-values to be updated atomically together with a document
> -------------------------------------------------------------------
>
>                 Key: LUCENE-8200
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8200
>             Project: Lucene - Core
>          Issue Type: Improvement
>    Affects Versions: 7.4, master (8.0)
>            Reporter: Simon Willnauer
>            Assignee: Simon Willnauer
>            Priority: Major
>         Attachments: LUCENE-8200.patch, LUCENE-8200.patch
>
>
> Today we can only update a document by deleting all previously indexed 
> documents for the given term. In some cases like when deletes are not `final` 
> in the way that documents that are marked as deleted should not be merged 
> away a `soft-delete` is needed which is possible when doc-values updates can 
> be done atomically just like delete and add in updateDocument(s)
>     
> This change introduces such a soft update that reuses all code paths from 
> deletes to update all previously updated documents for a given term instead 
> of marking it as deleted. This is a spinnoff from LUCENE-8198



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