Krisztian Kasa created HIVE-26618:
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Summary: Add setting to turn on/off removing sections of a query
plan known never produces rows
Key: HIVE-26618
URL: https://issues.apache.org/jira/browse/HIVE-26618
Project: Hive
Issue Type: Improvement
Components: CBO
Reporter: Krisztian Kasa
Assignee: Krisztian Kasa
HIVE-26524 introduced an optimization to remove sections of query plan known
never produces rows.
Add a setting into hive conf to turn on/off this optimization.
When the optimization is turned off restore the legacy behavior:
* represent empty result operator with {{HiveSortLimit}} 0
* disable {{HiveRemoveEmptySingleRules}}
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