yahoNanJing commented on code in PR #4043:
URL: https://github.com/apache/arrow-datafusion/pull/4043#discussion_r1012473317
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datafusion/physical-expr/src/physical_expr.rs:
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@@ -136,6 +138,67 @@ impl PhysicalExprStats for BasicExpressionStats {
}
}
+#[derive(Debug, Clone)]
+pub struct EquivalenceProperties {
Review Comment:
Hi @alamb, is there a kind of linked hash map in Rust? Maybe better to
leverage a similar data structure here.
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