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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2017/06/01 18:41:04 UTC

[jira] [Created] (CALCITE-1821) Support typed columns in Druid

Julian Hyde created CALCITE-1821:
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             Summary: Support typed columns in Druid
                 Key: CALCITE-1821
                 URL: https://issues.apache.org/jira/browse/CALCITE-1821
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde
            Assignee: Julian Hyde


Druid 0.10 introduces typed columns. We should make Calcite's Druid adapter aware of types. Here are the improvements:
* group by druid metrics;
* filter by druid metrics;
* we can send a hint to druid that a dimension is a number that can make aggregation more efficient;
* virtual column that can be used as arbitrary expression over metrics.

[~bslim], By "typed columns" do you mean [numeric dimensions|http://druid.io/docs/0.10.0/ingestion/schema-design.html#numeric-dimensions]. If so let's be consistent with Druid's terminology.



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