Show HN: ClickBench Playground – a playground for 110 database systems

(benchmark.clickhouse.com)

17 points | by zX41ZdbW 7 hours ago ago

5 comments

  • eterm 7 hours ago ago

    That's actually neat, I can finally do a full sweep of something I found after the recent post about Lobsters migration, I came across a query that evaluates differently in MariaDB and SQLite.

        SELECT CASE WHEN 1 / 5 * 100.0 = 1 * 100.0 / 5 THEN 1 ELSE 0 END AS Huh
    
    In some engines that evaluates to 1 and in some it evaluates to 0.

    In some ( oracle ), it doesn't evaluate at all without a trick to bind it to a table.

  • cvince 3 hours ago ago

    Really cool idea. Skimmed the writeup, but none of this is emulated???

    • zX41ZdbW 21 minutes ago ago

      All databases are hosted in VMs. Most of them only support amd64, so the host machine is also amd64 - this is the only limitation. It uses hardware virtualization, so nothing is emulated.

  • jauntywundrkind 5 hours ago ago

    Incredible! This is amazing!

    README says it downloads onto a host the dataset, (builds if needed then) runs a snapshotted firecracker microvms that exposes a small /query endpoint. A monitor records and posts results.

    https://github.com/ClickHouse/ClickBench/tree/main/playgroun...

    Was a little hard to find in the changelog myself (unaided) since there has been such a massive flood of results getting added! Salute to that!! Epic work.