alamb commented on code in PR #15211:
URL: https://github.com/apache/datafusion/pull/15211#discussion_r1999332505
##########
datafusion/substrait/src/logical_plan/consumer.rs:
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@@ -1074,6 +1074,9 @@ pub async fn from_project_rel(
// leaving only explicit expressions.
let mut explicit_exprs: Vec<Expr> = vec![];
+ // For WindowFunctions, we need to wrap them in a Window relation. If
there are duplicates,
+ // we can do the window'ing only once, then the project will duplicate
the result.
+ let mut window_exprs: HashSet<Expr> = HashSet::new();
Review Comment:
It seems like an improvement over what is on main, so I think we could merge
this PR as is, but this seems the potential reordering might cause potentially
confusing intermittently variable output
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