[jira] [Created] (SOLR-7098) Solr Join: Return Parent and Child Documents

["yuanyun.cn (JIRA)" <ji...@apache.org>]

yuanyun.cn created SOLR-7098:
--------------------------------

             Summary: 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: yuanyun.cn
            Priority: Minor
             Fix For: 5.1


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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