englefly commented on code in PR #18035:
URL: https://github.com/apache/doris/pull/18035#discussion_r1145616268
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fe/fe-core/src/main/java/org/apache/doris/nereids/stats/ExpressionEstimation.java:
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@@ -289,12 +290,7 @@ public ColumnStatistic visitCount(Count count, Statistics
context) {
// TODO: return a proper estimated stat after supports histogram
@Override
public ColumnStatistic visitSum(Sum sum, Statistics context) {
- ColumnStatistic columnStatistic = sum.child().accept(this, context);
- return new ColumnStatisticBuilder(columnStatistic)
- .setMaxValue(columnStatistic.maxValue * context.getRowCount()
/ columnStatistic.ndv)
- .setMinValue(columnStatistic.minValue * context.getRowCount()
/ columnStatistic.ndv)
- .setAvgSizeByte(sum.getDataType().width())
- .setDataSize(sum.getDataType().width() *
context.getRowCount()).build();
Review Comment:
to compute dataSize, we need rows after agg, not context.getRowCount()
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