Vihang Karajgaonkar created IMPALA-10700:
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Summary: Introduce an option to skip deleting column statistics on
truncate
Key: IMPALA-10700
URL: https://issues.apache.org/jira/browse/IMPALA-10700
Project: IMPALA
Issue Type: Improvement
Reporter: Vihang Karajgaonkar
Assignee: Vihang Karajgaonkar
Currently when a user issues {{truncate table}} command on a non-transactional
table, catalogd also deletes the table and column statistics. However, this can
affect the performance of the truncate operation especially at high
concurrency. Based on preliminary research it looks like other databases do not
delete statistics after truncate operation (e.g Oracle, Hive). It would be good
to introduce a query option which can set by the user to skip deleting the
column statistics during the truncate table execution.
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