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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