alamb commented on code in PR #5509:
URL: https://github.com/apache/arrow-datafusion/pull/5509#discussion_r1131524917
##########
datafusion/expr/src/logical_plan/plan.rs:
##########
@@ -174,7 +174,26 @@ impl LogicalPlan {
}
}
+ /// Used for normalizing columns, as the fallback schemas to the main
schema
+ /// of the plan.
+ pub fn fallback_normalize_schemas(&self) -> Vec<&DFSchema> {
+ match self {
+ LogicalPlan::Window(_)
+ | LogicalPlan::Projection(_)
+ | LogicalPlan::Aggregate(_)
+ | LogicalPlan::Unnest(_)
+ | LogicalPlan::Join(_)
+ | LogicalPlan::CrossJoin(_) => self
+ .inputs()
+ .iter()
+ .map(|input| input.schema().as_ref())
+ .collect(),
+ _ => vec![],
+ }
+ }
Review Comment:
maybe @houqp can provide some historical context about why all schemas is
needed (maybe it was for UNIONs or JOINs?)
It may also be for a limitation that no longer exists.
cc @waynexia who I think may also have hit this recently
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