[SPARK-22945] add java UDF APIs in the functions object

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: Wenchen Fan
• Reporter: Wenchen Fan
• Created: 03/Jan/18 14:37
• Updated: 04/Jan/18 11:18
• Resolved: 04/Jan/18 11:18

Description

Currently Scala users can use UDF like

val foo = udf((i: Int) => Math.random() + i).asNondeterministic
df.select(foo('a))

Python users can also do it with similar APIs. However Java users can't do it, we should add Java UDF APIs in the functions object.

Issue Links

• links to: [Github] Pull Request #20141 (cloud-fan)