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https://issues.apache.org/jira/browse/SOLR-13320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16828861#comment-16828861
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Tomás Fernández Löbbe commented on SOLR-13320:
----------------------------------------------

With {{DocBasedVersionConstraintsProcessor}} you can tell Solr to skip 
documents that have a higher (or equal) version than the one you are trying to 
add (see {{ignoreOldUpdates}}). Isn't that what you need?

> add a param ignoreDuplicates=true to updates to not overwrite existing docs
> ---------------------------------------------------------------------------
>
>                 Key: SOLR-13320
>                 URL: https://issues.apache.org/jira/browse/SOLR-13320
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>            Priority: Major
>
> Updates should have an option to ignore duplicate documents and drop them if 
> an option  {{ignoreDuplicates=true}} is specified



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