Add differentiable-SQL demos: ARCO-ERA5 and gradient descent - #200

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alxmrs wants to merge 13 commits into

claude/xarray-sql-autograd-73ovqqfrom

claude/xarray-sql-era5-demo

Commits on Jun 27, 2026

Add symbolic differentiation engine for SQL expressions (autograd MVP)
claude
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6838859
Add Substrait bridge to apply grad() rewrite in the Python context
claude
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ee2e011
Expose grad() in XarrayContext SQL via the Substrait rewrite
claude
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d456934

Commits on Jun 28, 2026

ci: install protoc for the substrait build
claude
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6946ca9
Add jacobian() for multi-input gradients
claude
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724099a
Replace array jacobian() with jvp()/vjp() forward & reverse modes
claude
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6319a06
Support grad/jvp/vjp on schema-qualified tables
claude
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c49003a
Verify and test higher-order grad
claude
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bdad6fb
Add differentiation-through-aggregate tests and docs
claude
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255413e
Resolve grad over any registered table, not just xarray ones
claude
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e2784c3
Add differentiate_sql: differentiate an expression to SQL text
claude
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55eba21

Commits on Jun 30, 2026

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

alxmrs
and
claude
committed
7b1e530
Add differentiable-SQL demos: ARCO-ERA5 and gradient descent

alxmrs
and
claude
committed
214399b