[HIVE-13861] Fix up nullability issue that might be created by pull up constants rules

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.1.0
• Component/s: CBO
• Target Version/s: 2.1.0
• Assignee: Jesús Camacho Rodríguez
• Reporter: Jesús Camacho Rodríguez
• Created: 26/May/16 10:03
• Updated: 27/Feb/24 22:23
• Resolved: 30/May/16 14:47

Description

When we pull up constants through Union or Sort operators, we might end up rewriting the original expression into an expression whose schema has different nullability properties for some of its columns.

This results in AssertionError of the following kind:

...
org.apache.hive.service.cli.HiveSQLException: Error running query: java.lang.AssertionError: Internal error: Cannot add expression of different type to set:
...

Issue Links

• is required by: HIVE-13807 Extend metadata provider to pull up predicates through Union