Dandandan commented on code in PR #3482:
URL: https://github.com/apache/arrow-datafusion/pull/3482#discussion_r973595592
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datafusion/core/src/execution/context.rs:
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@@ -1437,6 +1438,7 @@ impl SessionState {
Arc::new(ScalarSubqueryToJoin::new()),
Arc::new(SubqueryFilterToJoin::new()),
Arc::new(EliminateFilter::new()),
+ Arc::new(ReduceCrossJoin::new()),
Review Comment:
Gradient descent itself is not directly possible - as that needs
differentiable functions / cost functions.
But other (black box) optimization algorithms are possible given some cost
function. I think the art of writing good cost functions for queries however
can be quite an art 🎨
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