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Posted to issues@calcite.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2017/01/18 18:11:26 UTC

[jira] [Created] (CALCITE-1587) Druid adapter: topN returns approximate results

Jesus Camacho Rodriguez created CALCITE-1587:
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             Summary: Druid adapter: topN returns approximate results
                 Key: CALCITE-1587
                 URL: https://issues.apache.org/jira/browse/CALCITE-1587
             Project: Calcite
          Issue Type: Bug
          Components: druid
    Affects Versions: 1.11.0
            Reporter: Jesus Camacho Rodriguez
            Assignee: Julian Hyde
             Fix For: 1.12.0


Currently, we convert to _topN_ queries. However, metrics returned by Druid will be approximate values. Thus, probably we should not convert to Druid topN queries and rather always use Druid groupBy.



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