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https://issues.apache.org/jira/browse/IMPALA-10700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang updated IMPALA-10700:
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Component/s: Catalog
> 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
> Components: Catalog
> Reporter: Vihang Karajgaonkar
> Assignee: Vihang Karajgaonkar
> Priority: Major
>
> 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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