For those curious, see the accusation here https://github.com/ClickHouse/ClickBench/pull/2165 and then the HN thread https://news.ycombinator.com/item?id=50205816

HN is waiting for the source code for pgrust 0.4-preview to be released, the version which allegedly cheated Clickhouse benchmark. So far, the people (person?) behind pgrust has not committed to releasing the offending code, and has instead offered other code (0.4-beta, not preview).