pg_stat_ch
A PostgreSQL extension that exports every query metric to ClickHouse.
clickhouse.com/blog/pg_stat_ch-postgres-extension-stats-to-clickhouse
Source
pg_stat_statements aggregates; pg_stat_ch keeps every event. It streams per-query execution stats from Postgres into ClickHouse, so you can slice query performance by any dimension after the fact. The launch post covers the design.