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https://issues.apache.org/jira/browse/IMPALA-11003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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LiPenglin closed IMPALA-11003.
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Resolution: Duplicate
> Disallow schema evolution for migrated Iceberg tables
> -----------------------------------------------------
>
> Key: IMPALA-11003
> URL: https://issues.apache.org/jira/browse/IMPALA-11003
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Reporter: Zoltán Borók-Nagy
> Assignee: LiPenglin
> Priority: Major
> Labels: impala-iceberg
>
> When external tables are converted to Iceberg, the data files remain intact.
> This means that the old data files don't have field id information which is
> essential for schema evolution.
> Migrated tables are tagged with table property "MIGRATED_TO_ICEBERG". See
> https://github.com/apache/hive/pull/2744/files
> Hive disallows some schema changing operations, e.g. "replace col" and
> "change col". See HIVE-25643.
> Impala should also disallow delete column / change column. ADD COLUMN should
> be fine.
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