slim bouguerra created HIVE-17627:
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Summary: Use druid scan query instead of the select query.
Key: HIVE-17627
URL: https://issues.apache.org/jira/browse/HIVE-17627
Project: Hive
Issue Type: Bug
Components: Druid integration
Reporter: slim bouguerra
The biggest difference between select query and scan query is that, scan query
doesn't retain all rows in memory before rows can be returned to client.
It will cause memory pressure if too many rows required by select query.
Scan query doesn't have this issue.
Scan query can return all rows without issuing another pagination query, which
is extremely useful when query against historical or realtime node directly.
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