Details
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Improvement
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Status: Open
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Major
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Resolution: Unresolved
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None
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None
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None
Description
After HIVE-15708 promotes Calcite to 1.12, TOP N queries over Druid tables will be implemented by GroupBy on Druid and then (sort and) Limit on Hive. The relevant changes on Calcite side are related to CALCITE-1578 and steam from fundamental semantic differences between Druid concept of TOP (ie. top within a GBy) vs. SQL TOP/LIMIT (ie. global).
Attachments
Issue Links
- is related to
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CALCITE-1758 Push to Druid OrderBy/Limit operation over time dimension and additional columns
- Closed
- relates to
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HIVE-16121 Add flag to allow approximate results coming from Druid
- Open