[SPARK-14451] Move encoder definition into Aggregator interface

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: SQL
• Assignee: Reynold Xin
• Reporter: Reynold Xin
• Created: 07/Apr/16 05:35
• Updated: 09/Apr/16 06:53
• Resolved: 09/Apr/16 06:53

Description

When we first introduced Aggregators, we required the user of Aggregators to (implicitly) specify the encoders. It would actually make more sense to have the encoders be specified by the implementation of Aggregators, since each implementation should have the most state about how to encode its own data type.

Issue Links

• links to: [Github] Pull Request #12231 (rxin)