Jesus Camacho Rodriguez created HIVE-14465:
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Summary: Recognize scan of Druid table in Calcite optimizer
Key: HIVE-14465
URL: https://issues.apache.org/jira/browse/HIVE-14465
Project: Hive
Issue Type: Sub-task
Components: Druid integration
Affects Versions: 2.2.0
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
If a table is handled by DruidStorageHandler, we should be able to recognize it
in Calcite. This way we will be able to apply rules in the optimizer to push an
operator pipeline into the DruidScan. This will help us generating Druid
featured queries e.g. timeseries, topn, groupby, or select.
For that purpose, we need to introduce a DruidQuery operator based on
TableScan. In particular, we should leverage the code introduced in
CALCITE-1121. Other operators will be pushed to DruidQuery if they can be
executed by Druid i.e. the decision will be made statically (if we can push
computation to Druid, we will do it). However, in the future the decision
should be cost-based.
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