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https://issues.apache.org/jira/browse/CALCITE-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1821:
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Component/s: druid
> Support typed columns in Druid
> ------------------------------
>
> Key: CALCITE-1821
> URL: https://issues.apache.org/jira/browse/CALCITE-1821
> Project: Calcite
> Issue Type: Bug
> Components: druid
> 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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