Differentiable SQL: grad()/jvp()/vjp() over xarray and any DataFusion table#192

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alxmrs wants to merge 12 commits into

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claude/xarray-sql-autograd-73ovqq

Commits on Jul 4, 2026

Add symbolic differentiation engine for SQL expressions (autograd MVP)

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Add Substrait bridge to apply grad() rewrite in the Python context

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Expose grad() in XarrayContext SQL via the Substrait rewrite

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ci: install protoc for the substrait build

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Add jacobian() for multi-input gradients

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Replace array jacobian() with jvp()/vjp() forward & reverse modes

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Support grad/jvp/vjp on schema-qualified tables

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Verify and test higher-order grad

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Add differentiation-through-aggregate tests and docs

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Resolve grad over any registered table, not just xarray ones

claude
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Add differentiate_sql: differentiate an expression to SQL text

claude
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Differentiate grad() as a SQL rewrite, dropping the Substrait bridge

alxmrs
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claude
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