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Posted to issues@hive.apache.org by "Marton Bod (Jira)" <ji...@apache.org> on 2022/01/06 15:39:00 UTC

[jira] [Commented] (HIVE-25849) Disable insert overwrite for bucket partitioned Iceberg tables

    [ https://issues.apache.org/jira/browse/HIVE-25849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17469972#comment-17469972 ] 

Marton Bod commented on HIVE-25849:
-----------------------------------

PR: [https://github.com/apache/hive/pull/2856/]

 

> Disable insert overwrite for bucket partitioned Iceberg tables
> --------------------------------------------------------------
>
>                 Key: HIVE-25849
>                 URL: https://issues.apache.org/jira/browse/HIVE-25849
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Marton Bod
>            Assignee: Marton Bod
>            Priority: Major
>
> Insert overwrite should be disabled where the target Iceberg table is a bucket partitioned table, since which existing partitions will be overwritten is very hard to predict from a user's POV, as it depends on the bucket hash values calculated for the new dataset's rows. It's better to be on the safe side and disable this operation to avoid unwanted data loss.



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