Add a generator for TPC-DS data set, similar to what
CALCITE-238 did for TPC-H.
This task is similar in some ways to CALCITE-178, which would embed a small-scale data set as an hsqldb jar file, rather than generating on the fly. But this one would allow data sets of any scale factor to be generated.
CALCITE-238, there will be a schema and a generator. All the code will be in Calcite initially, but I plan to move the generator into a separate project (analogous to https://github.com/airlift/tpch).