Time to put Voltage (the garbage integration Vertica uses for the same purpose) out of business. It's such a horribly documented and needlessly complex tool. Even their engineer had a hard time clarifying unknowns.
It only works with Clickhouse... ugh.
> The program is installed with clickhouse-client, has no dependencies, and works on almost any flavor of Linux. You can apply it to any database dump, not just ClickHouse. For instance, you can generate test data from MySQL or PostgreSQL databases or create development databases that are similar to your production databases.