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https://issues.apache.org/jira/browse/HIVE-27005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17955390#comment-17955390
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Denys Kuzmenko commented on HIVE-27005:
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hi [~simhadri-g], that should be addressed, right? We provide incremental col
stats support for inserts.
> 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
> Assignee: Simhadri Govindappa
> Priority: Major
> Labels: iceberg, performance
> 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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