Rajesh Balamohan created HIVE-27005:
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Summary: Iceberg: Col stats are not used in queries
Key: HIVE-27005
URL: https://issues.apache.org/jira/browse/HIVE-27005
Project: Hive
Issue Type: Improvement
Components: Iceberg integration
Reporter: Rajesh Balamohan
Attachments: col_stats.txt
1. Though, insert-queries compute colstats during runtime, they are not
persisted in HMS during final call.
2. Due to #1, col stats are not available during runtime for hive queries. This
includes col stats, NDV etc. So unless users explicitly run "analyse table"
statements, queries can be have suboptimal plans.
E.g
[col_stats.txt{^}!https://jira.cloudera.com/images/icons/link_attachment_7.gif|width=7,height=7!{^}|https://jira.cloudera.com/secure/attachment/658390/658390_col_stats.txt](note
that there is no col stats being used)
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