8.Query execution ZQL queries are parsed and executed by the back end The backend translate ZQL queries into a query plan in the form of a directed acyclic graph. Two kinds of nodes: Collection Nodes Process Nodes
9.Process Function Questions What are some interesting t functions? What properties or patterns can these t functions express? What do different distance functions show? How do we know what distance metric is best? Our process structure can allow for user defined functions. What would be some useful functions that do not fall under the two functional primitives ZQL supports?
11.Optimization Techniques Why no improvements with parallelism?
12.ZQL Table Based Queries