Show HN: Rocky – Rust SQL engine with branches, replay, column lineage

Re:Show HN: Rocky – Rust SQL engine with branches, replay, c... by hugocorreia90 on Wednesday April 29, 2026 @06:49AM (#47946524)

Thanks. On model versioning — what's the use case you have in mind? A few options that map to different designs:

- dbt-style semantic-layer versions (v1/v2 of a model) - schema migration history - branch-based (Rocky already has branches + replay)

Different design choice for each, so it helps to know which problem you're trying to solve.

ClickHouse is tractable through the Adapter SDK without engine patching. If you can share roughly your model count and workload shape, I can put a real timeline on it. Open to community PRs too.

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Re:Show HN: Rocky – Rust SQL engine with branches, replay, c... by kjuulh on Wednesday April 29, 2026 @07:23AM (#47946786)

fyi, llm written comments are discouraged on hackernews.

https://news.ycombinator.com/item?id=47340079

Not saying yours are, but them -- dashes certainly looks like it ;)

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Re:Show HN: Rocky – Rust SQL engine with branches, replay, c... by hugocorreia90 on Wednesday April 29, 2026 @07:43AM (#47946964)

Fair. I just use it for tidying up my replies as I'm not a native English speaker.

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