rluvaton commented on code in PR #22064:
URL: https://github.com/apache/datafusion/pull/22064#discussion_r3201106216
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datafusion/physical-plan/src/joins/nested_loop_join.rs:
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@@ -1611,6 +1611,12 @@ impl NestedLoopJoinStream {
}
}
+ // If the left stream is fully exhausted, release its resources so the
+ // upstream pipeline can be torn down before we move on to probing.
+ if self.left_exhausted {
+ active.left_stream = None;
+ }
Review Comment:
maybe there are cases that left exhausted is true and left stream is not
None, because what is the reason to have both exhausted flag and Option
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