mingmwang commented on code in PR #4122:
URL: https://github.com/apache/arrow-datafusion/pull/4122#discussion_r1015193475
##########
datafusion/core/src/physical_plan/mod.rs:
##########
@@ -477,6 +473,66 @@ impl Partitioning {
RoundRobinBatch(n) | Hash(_, n) | UnknownPartitioning(n) => *n,
}
}
+
+ /// Returns true when the guarantees made by this [[Partitioning]] are
sufficient to
+ /// satisfy the partitioning scheme mandated by the `required`
[[Distribution]]
+ pub fn satisfy<F: FnOnce() -> EquivalenceProperties>(
+ &self,
+ required: Distribution,
+ equal_properties: F,
+ ) -> bool {
+ match required {
+ Distribution::UnspecifiedDistribution => true,
Review Comment:
SinglePartition should already be covered by existing UTs.
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