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[opt](nereids)using mv's derived stats #35721 (#37098)

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pick from #35721

(cherry picked from commit a481d79b1e258f7b6711157bb0d5e4c224e680e5)

## Proposed changes

Issue Number: close #xxx

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This commit is contained in:
minghong
2024-07-02 13:54:05 +08:00
committed by GitHub
parent c66975b244
commit 0c8934642e
1 changed files with 15 additions and 0 deletions
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15
fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java
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@ -760,6 +760,21 @@ public class StatsCalculator extends DefaultPlanVisitor<Statistics, Void> {
// 2. Consider the influence of runtime filter
// 3. Get NDV and column data size from StatisticManger, StatisticManager doesn't support it now.
private Statistics computeCatalogRelation(CatalogRelation catalogRelation) {
if (catalogRelation instanceof LogicalOlapScan) {
LogicalOlapScan olap = (LogicalOlapScan) catalogRelation;
if (olap.getSelectedIndexId() != olap.getTable().getBaseIndexId()) {
// mv is selected, return its estimated stats
Optional<Statistics> optStats = cascadesContext.getStatementContext()
.getStatistics(olap.getRelationId());
if (optStats.isPresent()) {
double actualRowCount = catalogRelation.getTable().getRowCountForNereids();
if (actualRowCount > optStats.get().getRowCount()) {
return optStats.get();
}
}
}
}
List<Slot> output = catalogRelation.getOutput();
ImmutableSet.Builder<SlotReference> slotSetBuilder = ImmutableSet.builderWithExpectedSize(output.size());
for (Slot slot : output) {