[SPARK-9241] Supporting multiple DISTINCT columns

• Type: Sub-task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.6.0
• Component/s: SQL
• Assignee: Herman van Hövell
• Reporter: Yin Huai
• Created: 22/Jul/15 04:52
• Updated: 09/Nov/15 11:50
• Resolved: 07/Nov/15 00:05

Description

Right now the new aggregation code path only support a single distinct column (you can use it in multiple aggregate functions in the query). We need to support multiple distinct columns by generating a different plan for handling multiple distinct columns (without change aggregate functions).

Issue Links

• blocks: SPARK-9830 Remove AggregateExpression1 and Aggregate Operator used to evaluate AggregateExpression1s
• links to: [Github] Pull Request #9280 (hvanhovell)
• links to: [Github] Pull Request #9406 (hvanhovell)
• links to: [Github] Pull Request #9541 (hvanhovell)
• links to: [Github] Pull Request #9566 (hvanhovell)