englefly commented on code in PR #13375:
URL: https://github.com/apache/doris/pull/13375#discussion_r1004035628
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java:
##########
@@ -104,7 +104,10 @@ public static void estimate(GroupExpression
groupExpression) {
private void estimate() {
StatsDeriveResult stats = groupExpression.getPlan().accept(this, null);
- groupExpression.getOwnerGroup().setStatistics(stats);
+ if (groupExpression.getOwnerGroup().getStatistics() == null
+ || (stats.getRowCount() <
groupExpression.getOwnerGroup().getStatistics().getRowCount())) {
Review Comment:
done
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculatorV2.java:
##########
@@ -99,7 +99,10 @@ public static void estimate(GroupExpression groupExpression)
{
private void estimate() {
StatsDeriveResult stats = groupExpression.getPlan().accept(this, null);
- groupExpression.getOwnerGroup().setStatistics(stats);
+ StatsDeriveResult originStats =
groupExpression.getOwnerGroup().getStatistics();
+ if (originStats == null || originStats.getRowCount() >
stats.getRowCount()) {
Review Comment:
done
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