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

["Julian Hyde (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde updated CALCITE-1821:
---------------------------------
    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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