[HIVE-20129] Revert to position based schema evolution for orc tables

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.2.0, 4.0.0
• Fix Version/s: 3.2.0, 4.0.0-alpha-1
• Target Version/s: 3.2.0, 4.0.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 09/Jul/18 22:28
• Updated: 17/Nov/22 08:54
• Resolved: 11/Jul/18 04:08

Description

Hive has been doing positional based schema evolution. ORC-54 changed it to column name based schema evolution causing unexpected results. Queries returned results earlier are now returning no results. Change the default in hive to positional schema evolution.