Known Issues in Iceberg

Learn about the known issues in Iceberg, the impact or changes to the functionality, and the workaround.

CDPD-75422: Impala schema case sensitivity issue with workaround

Impala's schema is case insensitive, causing errors with mixed case schema elements created through Spark during predicate pushdown.

• Create tables through Impala to ensure lower case schema.
• Avoid upper case in Spark: Do not use upper case when creating tables through Spark.
• Fix existing tables: Use ALTER TABLE to rename upper case columns:

  ALTER TABLE `database`.`iceberg_table` CHANGE COLUMN ID id string;