Apache Arrow DataFusion Architecture Part 2

The part 2 in a 3 part series of "DataFusion Architecture" presentations. Part 2 covers SQL query planning, LogicalPlans, and Expr expressions https://arrow.apache.org/datafusion/ Slides: https://docs.google.com/presentation/d/1ypylM3-w60kVDW7Q6S99AHzvlBgciTdjsAfqNP85K30