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The following commit(s) were added to refs/heads/master by this push:
new 02149ff329 [fix](nereids) Agg on unknown-stats column (#21428)
02149ff329 is described below
commit 02149ff329f6280cc5eaecc9a8b3f7eef3604ad4
Author: minghong <[email protected]>
AuthorDate: Fri Jul 7 17:03:04 2023 +0800
[fix](nereids) Agg on unknown-stats column (#21428)
---
.../java/org/apache/doris/nereids/stats/StatsCalculator.java | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java
index 385c0227ea..da6af46376 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java
@@ -680,11 +680,13 @@ public class StatsCalculator extends
DefaultPlanVisitor<Statistics, Void> {
}
int groupByCount = groupByExpressions.size();
if
(groupByColStats.values().stream().anyMatch(ColumnStatistic::isUnKnown)) {
+ // if there is group-bys, output row count is
childStats.getRowCount() * DEFAULT_AGGREGATE_RATIO,
+ // o.w. output row count is 1
+ // example: select sum(A) from T;
if (groupByCount > 0) {
- rowCount *= DEFAULT_AGGREGATE_RATIO *
Math.pow(DEFAULT_AGGREGATE_EXPAND_RATIO, groupByCount - 1);
- }
- if (rowCount > childStats.getRowCount()) {
- rowCount = childStats.getRowCount();
+ rowCount = childStats.getRowCount() * DEFAULT_AGGREGATE_RATIO;
+ } else {
+ rowCount = 1;
}
} else {
if (groupByCount > 0) {
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