Turning a Relational RDBMS Table into a...

This session presents a Spark DataSource implementation for integrating (joining) Big Data in HDFS or NoSQL DBMS with Master Data in RDBMS table. The session describes how to allow parallel and direct access to RDBMS tables from Spark, generate partitions of Spark JDBCRDDs based on the split pattern and rewrites Spark SQL queries into the RDBMS SQL dialect. The session also describes the performance optimizations including hooks in the JDBC driver for faster type conversions, pushing down predicates to the RDBMS, pruning partition based on the where clause, and projecting columns to the RDBMS table to reduce the amount of data returned and processed on Spark.