gene-bordegaray commented on code in PR #19304:
URL: https://github.com/apache/datafusion/pull/19304#discussion_r2621017190
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datafusion/common/src/config.rs:
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@@ -1000,6 +1000,29 @@ config_namespace! {
/// ```
pub repartition_sorts: bool, default = true
+ /// Should DataFusion still repartition if the required partitioning
+ /// expression is a subset of the current partition expression.
+ ///
+ /// How the option is used:
+ /// - repartition_subset_satisfactions=true: Always repartition on
a subset satisfaction.
+ /// - repartition_subset_satisfactions=false: Only repartition if
target_partitions > current partitions (increases parallelism).
Review Comment:
I am going to swith the use to be more explicit where it is a threshold. The
user can then set this to say max integer and always take advantage of subset
properties
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