[jira] [Created] (IMPALA-11003) Disallow schema evolution for migrated Iceberg tables

["Zoltán Borók-Nagy (Jira)" <ji...@apache.org>]

Zoltán Borók-Nagy created IMPALA-11003:
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             Summary: Disallow schema evolution for migrated Iceberg tables
                 Key: IMPALA-11003
                 URL: https://issues.apache.org/jira/browse/IMPALA-11003
             Project: IMPALA
          Issue Type: Bug
            Reporter: Zoltán Borók-Nagy


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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