Marton Bod created HIVE-25849:
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             Summary: 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


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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