Kikyou1997 commented on code in PR #13883:
URL: https://github.com/apache/doris/pull/13883#discussion_r1012796595
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fe/fe-core/src/main/java/org/apache/doris/statistics/StatsDeriveResult.java:
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@@ -48,10 +48,7 @@ public StatsDeriveResult(double rowCount) {
public StatsDeriveResult(StatsDeriveResult another) {
this.rowCount = another.rowCount;
- slotIdToColumnStats = new HashMap<>();
- for (Entry<Id, ColumnStatistic> entry :
another.slotIdToColumnStats.entrySet()) {
- slotIdToColumnStats.put(entry.getKey(), entry.getValue().copy());
- }
+ slotIdToColumnStats = new HashMap<>(another.slotIdToColumnStats);
Review Comment:
All the member of `ColumnStatistic` is already modified with `final`
keyword so there is no need to copy again here.
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