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Print splits count and distribution time in EXPLAIN ANALYZE #25028

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Merged
wendigo merged 1 commit into from
Feb 16, 2025
Merged

Print splits count and distribution time in EXPLAIN ANALYZE #25028

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11 changes: 11 additions & 0 deletions core/trino-main/src/main/java/io/trino/sql/planner/planprinter/PlanPrinter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -507,6 +507,10 @@ private static String formatFragment(
stageStats.getPeakUserMemoryReservation().succinct(),
tasks.size(),
maxPeakTaskMemoryUsage.succinct()));
if (stageStats.getGetSplitDistribution().getTotal() > 0) {
builder.append(indentString(1))
.append(format("Total split distribution time: %sms\n", formatDouble(stageStats.getGetSplitDistribution().getTotal() / 1_000_000)));
}
Optional<DistributionSnapshot> outputBufferUtilization = stageInfo.get().getStageStats().getOutputBufferUtilization();
if (verbose && outputBufferUtilization.isPresent()) {
builder.append(indentString(1))
Expand Down Expand Up @@ -1146,6 +1150,7 @@ public Void visitTableScan(TableScanNode node, Context context)
formatPositions(nodeStats.getPlanNodeInputPositions()),
nodeStats.getPlanNodeInputDataSize().toString());
addPhysicalInputStats(nodeStats, inputDetailBuilder, argsBuilder);
addSplits(nodeStats, inputDetailBuilder, argsBuilder);
appendDetailsFromBuilder(nodeOutput, inputDetailBuilder, argsBuilder);
}
return null;
Expand Down Expand Up @@ -1280,6 +1285,7 @@ private Void visitScanFilterAndProjectInfo(
nodeStats.getPlanNodeInputDataSize().toString(),
formatDouble(filtered));
addPhysicalInputStats(nodeStats, inputDetailBuilder, argsBuilder);
addSplits(nodeStats, inputDetailBuilder, argsBuilder);
appendDetailsFromBuilder(nodeOutput, inputDetailBuilder, argsBuilder);
}
List<DynamicFilterDomainStats> collectedDomainStats = dynamicFilters.stream()
Expand Down Expand Up @@ -1310,6 +1316,11 @@ private Void visitScanFilterAndProjectInfo(
return null;
}

private void addSplits(PlanNodeStats nodeStats, StringBuilder inputDetailBuilder, ImmutableList.Builder<String> argsBuilder)
{
buildFormatString(inputDetailBuilder, argsBuilder, ", Splits: %s", String.valueOf(nodeStats.getOperatorStats().values().iterator().next().getTotalDrivers()));
}

private static void addPhysicalInputStats(PlanNodeStats nodeStats, StringBuilder inputDetailBuilder, ImmutableList.Builder<String> argsBuilder)
{
if (nodeStats.getPlanNodePhysicalInputDataSize().toBytes() > 0) {
Expand Down