924060929 commented on code in PR #17790:
URL: https://github.com/apache/doris/pull/17790#discussion_r1136735778
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/memo/GroupExpression.java:
##########
@@ -319,10 +320,8 @@ public String toString() {
builder.append("#").append(ownerGroup.getGroupId().asInt());
}
- DecimalFormat decimalFormat = new DecimalFormat();
- decimalFormat.setGroupingSize(3);
- builder.append(" cost=").append(decimalFormat.format((long) cost));
- builder.append(" estRows=").append(estOutputRowCount);
+ builder.append(" cost=").append(NUM_FORMAT.format((long) cost));
+ builder.append("
estRows=").append(NUM_FORMAT.format(estOutputRowCount));
Review Comment:
please add synchronized block for NUM_FORMAT, because the NUM_FORMAT is a
global variable
<img width="726" alt="image"
src="https://user-images.githubusercontent.com/8806055/225260199-bb2d4f0d-ac96-489e-84c6-ce82b9e8334e.png";>
e.g.
```java
synchronized(NUM_FORMAT) {
...
}
```
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