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https://issues.apache.org/jira/browse/SOLR-7098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Khludnev closed SOLR-7098.
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Resolution: Won't Fix
> Solr Join: Return Parent and Child Documents
> --------------------------------------------
>
> Key: SOLR-7098
> URL: https://issues.apache.org/jira/browse/SOLR-7098
> Project: Solr
> Issue Type: Improvement
> Components: search
> Reporter: jefferyyuan
> Priority: Minor
> Labels: join, search
> Fix For: 6.0, 5.2
>
>
> Solr JoinQParserPlugin returns only right side(parent) documents, it would be
> great if we can return all documents.
> User case:
> If JoinQParserPlugin can return all (parent and child) documents, client can
> group parent and child docs together with same group.field - (optionally)
> then use group.main=true to navigate them.
> The implementation in single mode:
> (as solr join doesn't support distributed search)
> req parameter: {!join from=man_id to=id includeParent=true}
> Add includeParent into org.apache.solr.search.JoinQuery
> Update JoinQuery's hashCode and equals to include includeParent.
> In org.apache.solr.search.JoinQuery.JoinQueryWeight.getDocSet()
> DocSet fromSet = fromSearcher.getDocSet(q);
> if (includeParent) {
> rstDocset = rstDocset.union(fromSet);
> }
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