MakeTPCHCatalog returns a test catalog loaded with the TPCH schema and statistics for scale factor 2.

NewConfigIterator returns a ConfigIterator that iterates over all of the possible inputs to the given Spec.

ConfigIterator takes a list of Options and produces every possible combination of them.

Options denotes a single input to a plan, along with the set of legal values for that input.

Spec defines a single parameterized Plan which we would like to benchmark.

Configuration is a particular set of inputs.