jonathanc-n commented on code in PR #20228:
URL: https://github.com/apache/datafusion/pull/20228#discussion_r2788216053
##########
datafusion/physical-plan/src/joins/hash_join/exec.rs:
##########
@@ -1476,12 +1517,32 @@ impl ExecutionPlan for HashJoinExec {
filter: dynamic_filter,
build_accumulator: OnceLock::new(),
}),
+ fetch: self.fetch,
});
result = result.with_updated_node(new_node as Arc<dyn
ExecutionPlan>);
}
}
Ok(result)
}
+
+ fn supports_limit_pushdown(&self) -> bool {
+ // Hash join execution plan does not support pushing limit down
through to children
+ // because the children don't know about the join condition and can't
+ // determine how many rows to produce
+ false
+ }
+
+ fn fetch(&self) -> Option<usize> {
+ self.fetch
+ }
+
+ fn with_fetch(&self, limit: Option<usize>) -> Option<Arc<dyn
ExecutionPlan>> {
+ HashJoinExecBuilder::from(self)
Review Comment:
Yes that makes sense, I can change to your recommendation
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