[IMPALA-3194] Unblock queries on scalar columns in RC files with complex types

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 2.5.0
• Fix Version/s: Impala 2.6.0, Impala 2.3.4, impala 2.5.1
• Component/s: Frontend
• Target Version: Impala 2.6.0, Impala 2.3.4, impala 2.5.1
• Assignee: Bharath Vissapragada
• Reporter: Bharath Vissapragada
• Created: 17/Mar/16 11:52
• Updated: 07/May/16 04:32
• Resolved: 31/Mar/16 12:10

Description

Commit 2b4d7e blocked queries on file formats that doesn't have nested type support yet.
IMPALA-2844 relaxed the logic a little and it blocks any queries that "materialize" columns on RC files with complex types. Some customers are relying on querying scalar columns in RC file and that needs to be unblocked as well. So this jira plans to allow all queries on RC file as long as they refer to only scalar types.