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https://issues.apache.org/jira/browse/SOLR-11267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16385918#comment-16385918
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ASF subversion and git services commented on SOLR-11267:
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Commit 50a04c077fc4ee76e86df33e3b35aa876f71ed77 in lucene-solr's branch 
refs/heads/master from [~noble.paul]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=50a04c0 ]

SOLR-11267: Add support for "add-distinct" atomic update operation


> Add support for "add-distinct" atomic update operation
> ------------------------------------------------------
>
>                 Key: SOLR-11267
>                 URL: https://issues.apache.org/jira/browse/SOLR-11267
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Ishan Chattopadhyaya
>            Assignee: Ishan Chattopadhyaya
>            Priority: Major
>         Attachments: SOLR-11267.patch, SOLR-11267.patch, SOLR-11267.patch
>
>
> Often, a multivalued field is used as a set of values. Since multivalued 
> fields are more like lists than sets, users do two consecutive operations, 
> remove and add, to insert an element into the field and also maintain the 
> set's property of only having unique elements.
> Proposing a new single operation, called "add-distinct" (which essentially 
> means "add-if-doesn't exist") for this.



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