Matt McCline created HIVE-11981: ----------------------------------- Summary: ORC Schema Evolution Issues (Vectorized, ACID, and Non-Vectorized) Key: HIVE-11981 URL: https://issues.apache.org/jira/browse/HIVE-11981 Project: Hive Issue Type: Bug Components: Hive, Transactions Reporter: Matt McCline Assignee: Matt McCline Priority: Critical
High priority issues with schema evolution for the ORC file format. Schema evolution here is limited to adding new columns and a few cases of column type-widening (e.g. int to bigint). Renaming columns, deleting column, moving columns and other schema evolution were not pursued due to lack of importance and lack of time. Also, it appears a much more sophisticated metadata would be needed to support them. The biggest issues for users have been adding new columns for ACID table (HIVE-11421 Support Schema evolution for ACID tables) and vectorization (HIVE-10598 Vectorization borks when column is added to table). -- This message was sent by Atlassian JIRA (v6.3.4#6332)