This PR aims at porting minimal code to generate TPC-DS data from databricks/spark-sql-perf. The classes in a new class file tpcdsDatagen.scala are basically copied from the databricks/spark-sql-perf codebase.
We frequently use TPCDS data now for benchmarks/tests, but the classes for the TPCDS schemas of datagen and benchmarks/tests are managed separately, e.g.,
I think this causes some inconveniences, e.g., we need to update both files in the separate repositories if we update the TPCDS schema #32037. So, it would be useful for the Spark codebase to generate them by referring to the same schema definition.