[HIVE-18135] Add validation to check if schema matches?

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Transactions
• Target Version/s: 3.0.0
• Assignee: Unassigned
• Reporter: Eugene Koifman
• Created: 22/Nov/17 22:34
• Updated: 22/Nov/17 22:34

Description

LoadSemanticAnalyzer.ensureFileFormatsMatch() checks InputFormats.
Should it also check to make sure schema matches or will schema evolution logic for ORC handle this.
Should it check that Acid metadata (ROW__ID) is not embedded in the data - if the file was originally take from an acid table. This will break reads.