[HIVE-12451] Orc fast file merging/concatenation should be disabled for ACID tables

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3.0, 2.0.0
• Fix Version/s: 3.0.0
• Component/s: ORC, Transactions
• Target Version/s: 1.3.0, 3.0.0
• Release Note: Concatenate is now supported on Acid tables
• Assignee: Eugene Koifman
• Reporter: Prasanth Jayachandran
• Created: 18/Nov/15 01:16
• Updated: 27/Feb/24 22:23
• Resolved: 09/Jan/19 23:58

Description

For ACID tables merging of small files should happen only through compaction. We should disable "alter table .. concatenate" for ACID tables. We should also disable ConditionalMergeFileTask if destination is an ACID table.

Issue Links

• is superceded by: HIVE-18288 merge/concat not supported on Acid table