gene-bordegaray commented on code in PR #20246:
URL: https://github.com/apache/datafusion/pull/20246#discussion_r2801144395
##########
datafusion/common/src/config.rs:
##########
@@ -996,6 +996,11 @@ config_namespace! {
///
/// Note: This may reduce parallelism, rooting from the I/O level, if
the number of distinct
/// partitions is less than the target_partitions.
+ ///
+ /// Note for partitioned hash join dynamic filtering:
+ /// preserving file partitions can allow partition-index routing (`i
-> i`) instead of
+ /// CASE-hash routing, but this assumes build/probe partition indices
stay aligned for
+ /// dynamic filter consumers.
Review Comment:
will do
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