saadtajwar commented on code in PR #23957:
URL: https://github.com/apache/datafusion/pull/23957#discussion_r3670307488
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datafusion/physical-plan/src/joins/hash_join/exec.rs:
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@@ -422,9 +425,14 @@ impl HashJoinExecBuilder {
// Validate null_aware flag
if exec.null_aware {
let join_type = exec.join_type();
- if !matches!(join_type, JoinType::LeftAnti) {
+ let partition_mode = exec.partition_mode();
+ if !matches!(
+ (join_type, partition_mode),
+ (JoinType::LeftAnti, _)
+ | (JoinType::RightAnti, PartitionMode::CollectLeft) //
`PartitionMode::CollectLeft` is safe because `RightAnti` is probe-driven
Review Comment:
Do we need the `partition_mode` check for `CollectLeft` here? Or should we
just count on it being enforced/never chosen as anything but `CollectLeft`
beforehand?
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