[HIVE-19615] Proper handling of is null and not is null predicate when pushed to Druid

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.1.0, 4.0.0-alpha-1
• Target Version/s: 3.1.0
• Assignee: Slim Bouguerra
• Reporter: Slim Bouguerra
• Created: 18/May/18 23:04
• Updated: 27/Feb/24 22:23
• Resolved: 26/May/18 15:02

Description

Recent development in Druid introduced new semantic of null handling here

Based on those changes when need to honer push down of expressions with is null/ is not null predicates.
The prosed fix overrides the mapping of Calcite Function to Druid Expression to much the correct semantic.

Sub-Tasks

• Follow up of HIVE-19615, use UnaryFunction instead of prefix: Closed