XieJiann commented on code in PR #27051:
URL: https://github.com/apache/doris/pull/27051#discussion_r1402079299
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fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/logical/LogicalJoin.java:
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@@ -357,6 +362,90 @@ public LogicalJoin<Plan, Plan>
withOtherJoinConjuncts(List<Expression> otherJoin
markJoinSlotReference, children);
}
+ private @Nullable Pair<Set<Slot>, Set<Slot>> extractHashKeys() {
+ Set<Slot> leftKeys = new HashSet<>();
+ Set<Slot> rightKeys = new HashSet<>();
+ for (Expression expression : hashJoinConjuncts) {
+ if (!(expression instanceof EqualTo
Review Comment:
Null safe equal will produce more rows when there are multiple nulls. It
depends whether the left/right can be null
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