jackwener commented on code in PR #17648:
URL: https://github.com/apache/doris/pull/17648#discussion_r1131973210
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fe/fe-core/src/main/java/org/apache/doris/nereids/memo/GroupExpression.java:
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@@ -57,6 +57,8 @@ public class GroupExpression {
private long estOutputRowCount = -1;
+ private Rule fromRule;
Review Comment:
please add comment to explain its usage
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