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Show HN: Automatic deduction of FlashAttention kernel from ~25 lines of SQL

Hacker News · 2026-10-30 · buzz 86 · 6 points / 0 comments

In this demo, we automatically deduce a FlashAttention kernel with ~25 lines of SQL, which just expresses vanilla attention. This is possible due to three portable SQL extensions that we’re building: - xarray-sql: a library that efficiently represents petabyte scale array datasets in the cloud as tables (relations). - ddx: a database extension that adds automatic differentiation in the style of JA

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