Check how optimizer behaves for TPC-DS queries

We had looked at some of TPC-DS queries on a case-by-case basis before.

It will be interesting to do a more comprehensive test. Possible goals

• How does MariaDB compare across versions and with other databases?
• Does EITS help?
• What is the effect of the new optimizer defaults
• etc

References

References:

• http://www.tpc.org/tpcds/
• https://github.com/gregrahn/tpcds-kit (includes the query generator)
• https://blog.pgaddict.com/posts/performance-since-postgresql-7-4-to-9-4-tpc-ds