vegarsti commented on code in PR #16985:
URL: https://github.com/apache/datafusion/pull/16985#discussion_r2243799221
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datafusion/physical-plan/src/unnest.rs:
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@@ -101,8 +101,22 @@ impl UnnestExec {
input: &Arc<dyn ExecutionPlan>,
schema: SchemaRef,
) -> PlanProperties {
+ // Extract equivalence properties from input plan
+ let input_eq_properties = input.equivalence_properties();
+ let input_oeq_class = input_eq_properties.oeq_class();
+ let orderings = input_oeq_class.orderings().to_vec();
+ let eq_group = input_eq_properties.eq_group();
+ let constraints = input_eq_properties.constraints();
+
Review Comment:
Since we have the correct schema, what may happen is that it thinks it has
an ordering on some column `col` (because we copy the properties from the
input), but we have unnested `col` so it no longer exists. Not sure what the
impact of that would be.
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