[MRQL-79] Add support for incremental query processing

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.6
• Fix Version/s: 0.9.6
• Component/s: Run-Time/Spark, Streaming
• Assignee: Leonidas Fegaras
• Reporter: Leonidas Fegaras
• Created: 10/Sep/15 20:02
• Updated: 09/Nov/15 18:47
• Resolved: 09/Nov/15 18:47

Description

This is a new feature for MRQL streaming: its task is to convert any stream-based MRQL query to an incremental query that merges the previous query results with the results of applying the query to the new data batches only. For example, it will be able to convert the MRQL PageRank query to an incremental PageRank query automatically. The basic idea was presented at ApacheCon'15 (page 28 in http://lambda.uta.edu/mrql-apachecon15.pdf ) as a future plan for MRQL. It will work on Spark Streaming mode for now, but later it will support Flink Streaming too.