seawinde commented on code in PR #54953:
URL: https://github.com/apache/doris/pull/54953#discussion_r2285009691
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/util/JoinUtils.java:
##########
@@ -484,4 +485,23 @@ public static boolean
checkReorderPrecondition(LogicalJoin<?, ?> top, LogicalJoi
markSlots.retainAll(bottom.getOutputSet());
return markSlots.isEmpty();
}
+
+ /**
+ * Use the children nullable property of the join to adjust the slot used
by the join conjuncts.
+ * Such as 'a left join b left join c where b.condition > 1'
+ * if the join change to '(b left join c) right a where b.condition > 1',
+ * the nullable property of b.condition should be false
+ */
+ public static LogicalJoin<Plan, Plan>
adjustJoinConjunctsNullable(LogicalJoin<Plan, Plan> join) {
+ Map<Slot, Slot> childSlotMap = new HashMap<>();
+ for (Plan child : join.children()) {
+ for (Slot slot : child.getOutput()) {
+ childSlotMap.put(slot, slot);
Review Comment:
have fixed
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