morrySnow commented on code in PR #11812:
URL: https://github.com/apache/doris/pull/11812#discussion_r951036619
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/util/JoinUtils.java:
##########
@@ -87,6 +91,117 @@ private static boolean isEqualTo(List<SlotReference>
leftSlots, List<SlotReferen
|| (leftSlotsSet.containsAll(rightUsed) &&
rightSlotsSet.containsAll(leftUsed));
}
+ private static class JoinSlotCoverageChecker {
+ HashSet<SlotReference> left;
+ HashSet<ExprId> leftExprIds;
+ HashSet<SlotReference> right;
+ HashSet<ExprId> rightExprIds;
+
+ JoinSlotCoverageChecker(List<SlotReference> left, List<SlotReference>
right) {
+ this.left = new HashSet<>(left);
+ leftExprIds = new
HashSet<>(left.stream().map(SlotReference::getExprId).collect(Collectors.toList()));
+ this.right = new HashSet<>(right);
+ rightExprIds = new
HashSet<>(right.stream().map(SlotReference::getExprId).collect(Collectors.toList()));
+ }
+
+ boolean isCoveredByLeftSlots(List<SlotReference> slots) {
+ boolean covered = left.containsAll(slots);
Review Comment:
> I am not sure that only comparing ExprId covers all cases
It is.
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