CitusDB is not relevant here, I believe, as it still uses Postgres' table storage, so it's not columnar. It might be good for analytical workloads, but I very m

CitusDB is not relevant here, I believe, as it still uses Postgres' table storage, so it's not columnar. It might be good for analytical workloads, but I very much doubt it will perform anywhere close to ClickHouse. Greenplum: I've not used it, but it does support columnar tables, so maybe it's comparable.