Run the tpcds_makex.sql in your TPC-DS schema at it will spool a new script called tpcds_etabs.sql. This spooled script will create a bunch of external tables enabling you to load the TPC-DS files generated by dsdgen.
I have also included tpcds_makex_adw.sql. It will create external tables in ADW to load from the object store.
The example tpcds_etabs.sql script has been tested on TPC-DS v1.4. For other versions, just run tpcds_makex.sql to create a new tpcds_etabs.sql file. The whole workflow has been tested on v1.4 and v2.5.
If you leave the script unedited, you just create a symbolic link "/tmp/tpcdsload" pointing to the directory containing all of your dsdgen files.
The external tables are named "X_tpcds_table_name" - so take care if you have any tables called "X_something" as these might be dropped when you run tpcds_etabs.sql.
I've included an example of how to load the data once the external tables have been created. See "load_example.sql".