David Smiley created SOLR-12157:
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             Summary: group.main ought to return group.ngroups as numFound and 
change start/rows semantics
                 Key: SOLR-12157
                 URL: https://issues.apache.org/jira/browse/SOLR-12157
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: David Smiley


I experimented with group=true (Result Grouping) in a product/SKU ecommerce 
scenario.  Ideally the client could be ignorant of the fact that the results 
are grouped when processing a grouped response (assuming it only needs the 
group heads and doesn't care how many matched per group).  It wants to see only 
the group head document, and have start/rows paging over them, and numFound to 
be the number of groups.  {{group.main}} doesn't do any of these things.  Is 
{{group.main}} actually useful to anyone right now?  If it's not; maybe we 
could change it (using some sort of back-compat mechanism like luceneVersion).



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