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
committed
Add Substrait bridge to apply grad() rewrite in the Python context
claude
committed
Expose grad() in XarrayContext SQL via the Substrait rewrite
claude
committed

Commits on Jun 28, 2026

Commits on Jun 30, 2026

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

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

alxmrs
and
claude
committed