[SPARK-21499] Support creating persistent function for Spark UDAF(UserDefinedAggregateFunction)

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: Xiao Li
• Reporter: Xiao Li
• Created: 21/Jul/17 08:02
• Updated: 22/Aug/17 20:02
• Resolved: 22/Aug/17 20:02

Description

Support creating persistent functions for Spark UDAF(UserDefinedAggregateFunction)
For example,

CREATE FUNCTION myDoubleAvg AS 'test.org.apache.spark.sql.MyDoubleAvg'

Issue Links

• links to: [Github] Pull Request #18700 (gatorsmile)