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https://issues.apache.org/jira/browse/SOLR-14330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276725#comment-17276725
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ASF subversion and git services commented on SOLR-14330:
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Commit 15aaec60d9bfa96f2837c38b7ca83e2c87c66d8d in lucene-solr's branch
refs/heads/master from Chris M. Hostetter
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=15aaec6 ]
SOLR-14330: ExpandComponent now supports an expand.nullGroup=true option
> Return docs with null value in expand for field when collapse has
> nullPolicy=collapse
> -------------------------------------------------------------------------------------
>
> Key: SOLR-14330
> URL: https://issues.apache.org/jira/browse/SOLR-14330
> Project: Solr
> Issue Type: Wish
> Reporter: Munendra S N
> Assignee: Chris M. Hostetter
> Priority: Major
> Attachments: SOLR-14330.patch, SOLR-14330.patch
>
>
> When documents doesn't contain value for field then, with collapse either
> those documents could be either ignored(default), collapsed(one document is
> chosen) or expanded(all are returned). This is controlled by {{nullPolicy}}
> When {{nullPolicy}} is {{collapse}}, it would be nice to return all documents
> with {{null}} value in expand block if {{expand=true}}
> Also, when used with {{expand.field}}, even then we should return such
> documents
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