[SPARK-21069] Add rate source to programming guide

• Type: Documentation
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.2.1, 2.3.0
• Component/s: Documentation, Structured Streaming
• Labels: starter
• Target Version/s: 2.3.0
• Assignee: Prashant Sharma
• Reporter: Shixiong Zhu
• Created: 12/Jun/17 21:59
• Updated: 08/Jul/17 06:33
• Resolved: 08/Jul/17 06:33

Description

SPARK-20979 added a new structured streaming source: rate source. We should document it.

Issue Links

• is related to: SPARK-20979 Add a rate source to generate values for tests and benchmark
• links to: [Github] Pull Request #18562 (ScrapCodes)