comphead commented on code in PR #10304:
URL: https://github.com/apache/datafusion/pull/10304#discussion_r1594814388
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datafusion/physical-plan/src/joins/sort_merge_join.rs:
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@@ -1195,7 +1205,40 @@ impl SMJStream {
.into_array(filter_batch.num_rows())?;
// The selection mask of the filter
- let mask =
datafusion_common::cast::as_boolean_array(&filter_result)?;
+ let mut mask =
+
datafusion_common::cast::as_boolean_array(&filter_result)?;
+ // for LeftSemi Join the filter mask should be calculated
in its own way:
+ // if we find at least one matching row for specific
streaming key/filter we dont need to check others for the same key/filter
+ let mut maybe_left_semi_mask: Option<BooleanArray> = None;
Review Comment:
I will add a unit test for left_semi_mask calculation
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