[IMPALA-5274] add distinct to aggregations

• Type: Task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: Impala 2.9.0
• Component/s: Infrastructure
• Labels: query_generator_development
• Target Version: Product Backlog
• Epic Color: ghx-label-6
• Assignee: Unassigned
• Reporter: Michael Brown
• Created: 02/May/17 23:03
• Updated: 28/Sep/17 19:50

Description

The query generator should sometimes add distinct to aggregations, like

SELECT COUNT(DISTINCT col) ...