liukun4515 commented on code in PR #4411:
URL: https://github.com/apache/arrow-datafusion/pull/4411#discussion_r1034651792
##########
datafusion/optimizer/src/limit_push_down.rs:
##########
@@ -192,6 +196,24 @@ impl OptimizerRule for LimitPushDown {
LogicalPlan::Join(join) => {
let limit = fetch + skip;
let new_join = match join.join_type {
+ JoinType::Left | JoinType::Right | JoinType::Full
+ if is_no_join_condition(join) =>
+ {
+ // push left and right
+ push_down_join(join, Some(limit), Some(limit))
+ }
+ JoinType::LeftSemi | JoinType::LeftAnti
+ if is_no_join_condition(join) =>
+ {
+ // push left
+ push_down_join(join, Some(limit), None)
+ }
+ JoinType::RightSemi | JoinType::RightAnti
Review Comment:
add the `right semi` and `right anti`
cc @jackwener
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