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branch-2.1[fix](nereids) fix bug in StatsCalculator.disableJoinReorderIfStatsInvalid when rowCount is not aviable #53834 #54426

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Merged
yiguolei merged 1 commit into from
Aug 14, 2025
Merged

branch-2.1[fix](nereids) fix bug in StatsCalculator.disableJoinReorderIfStatsInvalid when rowCount is not aviable #53834 #54426

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14 changes: 11 additions & 3 deletions fe/fe-core/src/main/java/org/apache/doris/nereids/stats/StatsCalculator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,7 @@
import org.apache.doris.nereids.types.DataType;
import org.apache.doris.nereids.util.PlanUtils;
import org.apache.doris.qe.ConnectContext;
import org.apache.doris.qe.SessionVariable;
import org.apache.doris.statistics.AnalysisManager;
import org.apache.doris.statistics.ColumnStatistic;
import org.apache.doris.statistics.ColumnStatisticBuilder;
Expand Down Expand Up @@ -362,16 +363,23 @@ public static Optional<String> disableJoinReorderIfStatsInvalid(List<CatalogRela
double rowCount = calculator.getTableRowCount(scan);
// row count not available
if (rowCount == -1) {
LOG.info("disable join reorder since row count not available: "
+ scan.getTable().getNameWithFullQualifiers());
try {
ConnectContext.get().getSessionVariable()
.setVarOnce(SessionVariable.DISABLE_JOIN_REORDER, "true");
LOG.info("disable join reorder since row count not available: "
+ scan.getTable().getNameWithFullQualifiers());
} catch (Exception e) {
LOG.info("disableNereidsJoinReorderOnce failed");
}
return Optional.of("table[" + scan.getTable().getName() + "] row count is invalid");
}
if (scan instanceof OlapScan) {
// ndv abnormal
Optional<String> reason = calculator.checkNdvValidation((OlapScan) scan, rowCount);
if (reason.isPresent()) {
try {
ConnectContext.get().getSessionVariable().disableNereidsJoinReorderOnce();
ConnectContext.get().getSessionVariable()
.setVarOnce(SessionVariable.DISABLE_JOIN_REORDER, "true");
LOG.info("disable join reorder since col stats invalid: "
+ reason.get());
} catch (Exception e) {
Expand Down