morningman commented on a change in pull request #4678:
URL: https://github.com/apache/incubator-doris/pull/4678#discussion_r499198500
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File path: fe/fe-core/src/main/java/org/apache/doris/planner/SelectNode.java
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@@ -63,13 +62,14 @@ public void init(Analyzer analyzer) throws UserException {
@Override
public void computeStats(Analyzer analyzer) {
super.computeStats(analyzer);
- if (getChild(0).cardinality == -1) {
- cardinality = -1;
+ long cardinality = getChild(0).cardinality;
+ double selectivity = computeSelectivity();
+ if (cardinality < 0 || selectivity < 0) {
+ this.cardinality = -1;
} else {
- cardinality = Math.round(((double) getChild(0).cardinality) *
computeSelectivity());
- Preconditions.checkState(cardinality >= 0);
+ this.cardinality = Math.round(cardinality * selectivity);
}
- LOG.info("stats Select: cardinality=" + Long.toString(cardinality));
+ LOG.info("stats Select: cardinality={}", this.cardinality);
Review comment:
```suggestion
LOG.debug("stats Select: cardinality={}", this.cardinality);
```
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