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

6 points • by zX41ZdbW • today at 6:17 PM • 2 comments • view on HN

I created it mostly for testing and exploration, but the main reason was that it became possible after previous work.

Comments

eterm • today at 6:28 PM

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.

jauntywundrkind • today at 8:24 PM

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.