gabotechs commented on code in PR #18753:
URL: https://github.com/apache/datafusion/pull/18753#discussion_r2554930787
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datafusion/substrait/src/logical_plan/producer/expr/window_function.rs:
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@@ -100,20 +101,20 @@ fn make_substrait_window_function(
lower_bound: Some(bounds.0),
upper_bound: Some(bounds.1),
args: vec![],
- bounds_type: bounds_type as i32,
+ bounds_type: bounds_type.to_i32(),
Review Comment:
I imagine that if this is of type `BoundsTypeExt::Groups`, it will produce
invalid Substrait, as this is not yet supported in Substrait
([link](https://github.com/substrait-io/substrait/blob/84816cd57e23b99b9e1816e1fffc740f121dbb22/proto/substrait/algebra.proto#L1301)).
I wonder if it's better to just fail if we find a `WindowFrameUnits::Groups`
until Substrait support groups bounds. What do you think? probably even worth
opening an issue in https://github.com/substrait-io/substrait
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