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englefly pushed a commit to branch tpc_preview6
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The following commit(s) were added to refs/heads/tpc_preview6 by this push:
new 1ff08374101 make slot that ndv > LOW_NDV_THRESHOLD can be chosen as
shuffle key in decomposeRepeat (#60610)
1ff08374101 is described below
commit 1ff083741016be9b9f8583b99f29483ac3e2e78f
Author: feiniaofeiafei <[email protected]>
AuthorDate: Mon Feb 9 15:00:19 2026 +0800
make slot that ndv > LOW_NDV_THRESHOLD can be chosen as shuffle key in
decomposeRepeat (#60610)
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
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---
.../java/org/apache/doris/nereids/PlanContext.java | 4 +
.../properties/ChildrenPropertiesRegulator.java | 24 ---
.../nereids/properties/RequestPropertyDeriver.java | 8 +-
.../rewrite/DecomposeRepeatWithPreAggregation.java | 64 +++-----
.../java/org/apache/doris/qe/SessionVariable.java | 9 ++
.../doris/statistics/util/StatisticsUtil.java | 20 +++
.../properties/RequestPropertyDeriverTest.java | 92 +++++++++++
.../DecomposeRepeatWithPreAggregationTest.java | 171 ++++++++++++++++++++-
.../decompose_repeat/decompose_repeat.groovy | 24 ++-
9 files changed, 334 insertions(+), 82 deletions(-)
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/PlanContext.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/PlanContext.java
index 09285a638de..e20d9bf4044 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/PlanContext.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/PlanContext.java
@@ -83,4 +83,8 @@ public class PlanContext {
public StatementContext getStatementContext() {
return connectContext.getStatementContext();
}
+
+ public ConnectContext getConnectContext() {
+ return connectContext;
+ }
}
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/ChildrenPropertiesRegulator.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/ChildrenPropertiesRegulator.java
index b415b1f8007..8db30640797 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/ChildrenPropertiesRegulator.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/ChildrenPropertiesRegulator.java
@@ -116,31 +116,7 @@ public class ChildrenPropertiesRegulator extends
PlanVisitor<List<List<PhysicalP
if (agg.getGroupByExpressions().isEmpty() &&
agg.getOutputExpressions().isEmpty()) {
return ImmutableList.of();
}
- // If the origin attribute satisfies the group by key but does not
meet the requirements, ban the plan.
- // e.g. select count(distinct a) from t group by b;
- // requiredChildProperty: a
- // but the child is already distributed by b
- // ban this plan
- PhysicalProperties originChildProperty =
originChildrenProperties.get(0);
PhysicalProperties requiredChildProperty = requiredProperties.get(0);
- PhysicalProperties hashSpec =
PhysicalProperties.createHash(agg.getGroupByExpressions(), ShuffleType.REQUIRE);
- GroupExpression child = children.get(0);
- if (child.getPlan() instanceof PhysicalDistribute) {
- PhysicalProperties properties = new PhysicalProperties(
- DistributionSpecAny.INSTANCE,
originChildProperty.getOrderSpec());
- Optional<Pair<Cost, GroupExpression>> pair =
child.getOwnerGroup().getLowestCostPlan(properties);
- // add null check
- if (!pair.isPresent()) {
- return ImmutableList.of();
- }
- GroupExpression distributeChild = pair.get().second;
- PhysicalProperties distributeChildProperties =
distributeChild.getOutputProperties(properties);
- if (distributeChildProperties.satisfy(hashSpec)
- &&
!distributeChildProperties.satisfy(requiredChildProperty)) {
- return ImmutableList.of();
- }
- }
-
if (!agg.getAggregateParam().canBeBanned) {
return visit(agg, context);
}
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/RequestPropertyDeriver.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/RequestPropertyDeriver.java
index bee83f0cc80..5a7134fffe0 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/RequestPropertyDeriver.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/properties/RequestPropertyDeriver.java
@@ -468,7 +468,7 @@ public class RequestPropertyDeriver extends
PlanVisitor<Void, PlanContext> {
Set<ExprId> intersectId = Sets.intersection(new
HashSet<>(parentHashExprIds),
new HashSet<>(groupByExprIds));
if (!intersectId.isEmpty() && intersectId.size() <
groupByExprIds.size()) {
- if (shouldUseParent(parentHashExprIds, agg)) {
+ if (shouldUseParent(parentHashExprIds, agg, context)) {
addRequestPropertyToChildren(PhysicalProperties.createHash(
Utils.fastToImmutableList(intersectId),
ShuffleType.REQUIRE));
}
@@ -482,7 +482,11 @@ public class RequestPropertyDeriver extends
PlanVisitor<Void, PlanContext> {
return null;
}
- private boolean shouldUseParent(List<ExprId> parentHashExprIds,
PhysicalHashAggregate<? extends Plan> agg) {
+ private boolean shouldUseParent(List<ExprId> parentHashExprIds,
PhysicalHashAggregate<? extends Plan> agg,
+ PlanContext context) {
+ if
(!context.getConnectContext().getSessionVariable().aggShuffleUseParentKey) {
+ return false;
+ }
Optional<GroupExpression> groupExpression = agg.getGroupExpression();
if (!groupExpression.isPresent()) {
return true;
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregation.java
b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregation.java
index 3939d79a510..fd40b635ffd 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregation.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregation.java
@@ -54,12 +54,12 @@ import org.apache.doris.nereids.util.ExpressionUtils;
import org.apache.doris.qe.ConnectContext;
import org.apache.doris.statistics.ColumnStatistic;
import org.apache.doris.statistics.Statistics;
+import org.apache.doris.statistics.util.StatisticsUtil;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.util.ArrayList;
-import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
@@ -407,11 +407,7 @@ public class DecomposeRepeatWithPreAggregation extends
DefaultPlanRewriter<Disti
if (groupingSets.size() <=
connectContext.getSessionVariable().decomposeRepeatThreshold) {
return -1;
}
- int maxGroupIndex = findMaxGroupingSetIndex(groupingSets);
- if (maxGroupIndex < 0) {
- return -1;
- }
- return maxGroupIndex;
+ return findMaxGroupingSetIndex(groupingSets);
}
/**
@@ -436,6 +432,9 @@ public class DecomposeRepeatWithPreAggregation extends
DefaultPlanRewriter<Disti
maxGroupIndex = i;
}
}
+ if (groupingSets.get(maxGroupIndex).isEmpty()) {
+ return -1;
+ }
// Second pass: verify that the max-size grouping set contains all
other grouping sets
ImmutableSet<Expression> maxGroup =
ImmutableSet.copyOf(groupingSets.get(maxGroupIndex));
for (int i = 0; i < groupingSets.size(); ++i) {
@@ -520,14 +519,14 @@ public class DecomposeRepeatWithPreAggregation extends
DefaultPlanRewriter<Disti
switch (repeat.getRepeatType()) {
case CUBE:
// Prefer larger NDV to improve balance
- chosen = chooseByNdv(maxGroupByList, inputStats,
totalInstanceNum);
+ chosen = chooseOneBalancedKey(maxGroupByList, inputStats,
totalInstanceNum);
break;
case GROUPING_SETS:
chosen = chooseByAppearanceThenNdv(repeat.getGroupingSets(),
maxGroupIndex, maxGroupByList,
inputStats, totalInstanceNum);
break;
case ROLLUP:
- chosen = chooseByRollupPrefixThenNdv(maxGroupByList,
inputStats, totalInstanceNum);
+ chosen = chooseOneBalancedKey(maxGroupByList, inputStats,
totalInstanceNum);
break;
default:
chosen = Optional.empty();
@@ -535,17 +534,21 @@ public class DecomposeRepeatWithPreAggregation extends
DefaultPlanRewriter<Disti
return chosen.map(ImmutableList::of);
}
- private Optional<Expression> chooseByNdv(List<Expression> candidates,
Statistics inputStats, int totalInstanceNum) {
+ private Optional<Expression> chooseOneBalancedKey(List<Expression>
candidates, Statistics inputStats,
+ int totalInstanceNum) {
if (inputStats == null) {
return Optional.empty();
}
- Comparator<Expression> cmp = Comparator.comparingDouble(e ->
estimateNdv(e, inputStats));
- Optional<Expression> choose = candidates.stream().max(cmp);
- if (choose.isPresent() && estimateNdv(choose.get(), inputStats) >
totalInstanceNum) {
- return choose;
- } else {
- return Optional.empty();
+ for (Expression candidate : candidates) {
+ ColumnStatistic columnStatistic =
inputStats.findColumnStatistics(candidate);
+ if (columnStatistic == null || columnStatistic.isUnKnown()) {
+ continue;
+ }
+ if (StatisticsUtil.isBalanced(columnStatistic,
inputStats.getRowCount(), totalInstanceNum)) {
+ return Optional.of(candidate);
+ }
}
+ return Optional.empty();
}
/**
@@ -568,42 +571,17 @@ public class DecomposeRepeatWithPreAggregation extends
DefaultPlanRewriter<Disti
}
}
}
- Map<Integer, List<Expression>> countToCandidate = new TreeMap<>();
+ TreeMap<Integer, List<Expression>> countToCandidate = new TreeMap<>();
for (Map.Entry<Expression, Integer> entry : appearCount.entrySet()) {
countToCandidate.computeIfAbsent(entry.getValue(), v -> new
ArrayList<>()).add(entry.getKey());
}
- for (Map.Entry<Integer, List<Expression>> entry :
countToCandidate.entrySet()) {
- Optional<Expression> chosen = chooseByNdv(entry.getValue(),
inputStats, totalInstanceNum);
+ for (Map.Entry<Integer, List<Expression>> entry :
countToCandidate.descendingMap().entrySet()) {
+ Optional<Expression> chosen =
chooseOneBalancedKey(entry.getValue(), inputStats, totalInstanceNum);
if (chosen.isPresent()) {
return chosen;
}
}
return Optional.empty();
-
- }
-
- /**
- * ROLLUP: prefer earliest prefix key; if NDV is too low, fallback to next
prefix.
- */
- private Optional<Expression> chooseByRollupPrefixThenNdv(List<Expression>
candidates, Statistics inputStats,
- int totalInstanceNum) {
- for (Expression c : candidates) {
- if (estimateNdv(c, inputStats) >= totalInstanceNum) {
- return Optional.of(c);
- }
- }
- return Optional.empty();
- }
-
- private double estimateNdv(Expression expr, Statistics stats) {
- if (stats == null) {
- return -1D;
- }
- ColumnStatistic col = stats.findColumnStatistics(expr);
- if (col == null || col.isUnKnown()) {
- return -1D;
- }
- return col.ndv;
}
/**
diff --git a/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
b/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
index 122065f6d35..02929b38868 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
@@ -839,6 +839,8 @@ public class SessionVariable implements Serializable,
Writable {
public static final String SKEW_REWRITE_JOIN_SALT_EXPLODE_FACTOR =
"skew_rewrite_join_salt_explode_factor";
public static final String SKEW_REWRITE_AGG_BUCKET_NUM =
"skew_rewrite_agg_bucket_num";
+ public static final String AGG_SHUFFLE_USE_PARENT_KEY =
"agg_shuffle_use_parent_key";
+
public static final String DECOMPOSE_REPEAT_THRESHOLD =
"decompose_repeat_threshold";
public static final String DECOMPOSE_REPEAT_SHUFFLE_INDEX_IN_MAX_GROUP
= "decompose_repeat_shuffle_index_in_max_group";
@@ -850,6 +852,7 @@ public class SessionVariable implements Serializable,
Writable {
+ "proportion as hot values, up to
HOT_VALUE_COLLECT_COUNT."})
public int hotValueCollectCount = 10; // Select the values that account
for at least 10% of the column
+
public void setHotValueCollectCount(int count) {
this.hotValueCollectCount = count;
}
@@ -2791,6 +2794,12 @@ public class SessionVariable implements Serializable,
Writable {
}, checker = "checkSkewRewriteAggBucketNum")
public int skewRewriteAggBucketNum = 1024;
+ @VariableMgr.VarAttr(name = AGG_SHUFFLE_USE_PARENT_KEY, description = {
+ "在聚合算子进行 shuffle 时，是否使用父节点的分组键进行 shuffle",
+ "Whether to use the parent node's grouping key for shuffling
during the aggregation operator"
+ }, needForward = false)
+ public boolean aggShuffleUseParentKey = true;
+
@VariableMgr.VarAttr(name = ENABLE_PREFER_CACHED_ROWSET, needForward =
false,
description = {"是否启用 prefer cached rowset 功能",
"Whether to enable prefer cached rowset feature"})
diff --git
a/fe/fe-core/src/main/java/org/apache/doris/statistics/util/StatisticsUtil.java
b/fe/fe-core/src/main/java/org/apache/doris/statistics/util/StatisticsUtil.java
index 014c9ace70f..02d275795de 100644
---
a/fe/fe-core/src/main/java/org/apache/doris/statistics/util/StatisticsUtil.java
+++
b/fe/fe-core/src/main/java/org/apache/doris/statistics/util/StatisticsUtil.java
@@ -64,6 +64,7 @@ import
org.apache.doris.nereids.trees.expressions.literal.Literal;
import org.apache.doris.nereids.trees.expressions.literal.TimestampTzLiteral;
import org.apache.doris.nereids.trees.expressions.literal.VarcharLiteral;
import org.apache.doris.nereids.types.DataType;
+import org.apache.doris.nereids.util.AggregateUtils;
import org.apache.doris.qe.AuditLogHelper;
import org.apache.doris.qe.AutoCloseConnectContext;
import org.apache.doris.qe.ConnectContext;
@@ -1322,4 +1323,23 @@ public class StatisticsUtil {
}
return null;
}
+
+ public static boolean isBalanced(ColumnStatistic columnStatistic, double
rowCount, int instanceNum) {
+ double ndv = columnStatistic.ndv;
+ double maxHotValueCntIncludeNull;
+ Map<Literal, Float> hotValues = columnStatistic.getHotValues();
+ // When hotValues not exist, or exist but unknown, treat nulls as the
only hot value.
+ if (columnStatistic.getHotValues() == null || hotValues.isEmpty()) {
+ maxHotValueCntIncludeNull = columnStatistic.numNulls;
+ } else {
+ double rate =
hotValues.values().stream().mapToDouble(Float::doubleValue).max().orElse(0);
+ maxHotValueCntIncludeNull = rate * rowCount >
columnStatistic.numNulls
+ ? rate * rowCount : columnStatistic.numNulls;
+ }
+ double rowsPerInstance = (rowCount - maxHotValueCntIncludeNull) /
instanceNum;
+ double balanceFactor = maxHotValueCntIncludeNull == 0
+ ? Double.MAX_VALUE : rowsPerInstance /
maxHotValueCntIncludeNull;
+ // The larger this factor is, the more balanced the data.
+ return balanceFactor > 2.0 && ndv > instanceNum * 3 && ndv >
AggregateUtils.LOW_NDV_THRESHOLD;
+ }
}
diff --git
a/fe/fe-core/src/test/java/org/apache/doris/nereids/properties/RequestPropertyDeriverTest.java
b/fe/fe-core/src/test/java/org/apache/doris/nereids/properties/RequestPropertyDeriverTest.java
index 4524fc10e5e..32a6adcf212 100644
---
a/fe/fe-core/src/test/java/org/apache/doris/nereids/properties/RequestPropertyDeriverTest.java
+++
b/fe/fe-core/src/test/java/org/apache/doris/nereids/properties/RequestPropertyDeriverTest.java
@@ -368,4 +368,96 @@ class RequestPropertyDeriverTest {
expected.add(Lists.newArrayList(PhysicalProperties.GATHER));
Assertions.assertEquals(expected, actual);
}
+
+ @Test
+ void testAggregateWithAggShuffleUseParentKeyDisabled() {
+ // Create ConnectContext with aggShuffleUseParentKey = false
+ ConnectContext testConnectContext = new ConnectContext();
+ testConnectContext.getSessionVariable().aggShuffleUseParentKey = false;
+
+ SlotReference key1 = new SlotReference(new ExprId(0), "col1",
IntegerType.INSTANCE, true, ImmutableList.of());
+ SlotReference key2 = new SlotReference(new ExprId(1), "col2",
IntegerType.INSTANCE, true, ImmutableList.of());
+ PhysicalHashAggregate<GroupPlan> aggregate = new
PhysicalHashAggregate<>(
+ Lists.newArrayList(key1, key2),
+ Lists.newArrayList(key1, key2),
+ new AggregateParam(AggPhase.GLOBAL, AggMode.BUFFER_TO_RESULT),
+ true,
+ logicalProperties,
+ groupPlan
+ );
+ GroupExpression groupExpression = new GroupExpression(aggregate);
+ new Group(null, groupExpression, null);
+
+ // Create a parent hash distribution with key1 only
+ PhysicalProperties parentProperties = PhysicalProperties.createHash(
+ Lists.newArrayList(key1.getExprId()), ShuffleType.REQUIRE);
+
+ new Expectations() {
+ {
+ jobContext.getRequiredProperties();
+ result = parentProperties;
+ }
+ };
+
+ RequestPropertyDeriver requestPropertyDeriver = new
RequestPropertyDeriver(testConnectContext, jobContext);
+ List<List<PhysicalProperties>> actual
+ =
requestPropertyDeriver.getRequestChildrenPropertyList(groupExpression);
+
+ // When aggShuffleUseParentKey is false, should only use all
groupByExpressions (key1, key2)
+ // and not use parent key (key1) separately
+ List<List<PhysicalProperties>> expected = Lists.newArrayList();
+ expected.add(Lists.newArrayList(PhysicalProperties.createHash(
+ Lists.newArrayList(key1.getExprId(), key2.getExprId()),
ShuffleType.REQUIRE)));
+ Assertions.assertEquals(1, actual.size());
+ Assertions.assertEquals(expected, actual);
+ }
+
+ @Test
+ void testAggregateWithAggShuffleUseParentKeyEnabled() {
+ // Create ConnectContext with aggShuffleUseParentKey = true (default
value)
+ ConnectContext testConnectContext = new ConnectContext();
+ testConnectContext.getSessionVariable().aggShuffleUseParentKey = true;
+
+ SlotReference key1 = new SlotReference(new ExprId(0), "col1",
IntegerType.INSTANCE, true, ImmutableList.of());
+ SlotReference key2 = new SlotReference(new ExprId(1), "col2",
IntegerType.INSTANCE, true, ImmutableList.of());
+ PhysicalHashAggregate<GroupPlan> aggregate = new
PhysicalHashAggregate<>(
+ Lists.newArrayList(key1, key2),
+ Lists.newArrayList(key1, key2),
+ new AggregateParam(AggPhase.GLOBAL, AggMode.BUFFER_TO_RESULT),
+ true,
+ logicalProperties,
+ groupPlan
+ );
+ GroupExpression groupExpression = new GroupExpression(aggregate);
+ new Group(null, groupExpression, null);
+
+ // Create a parent hash distribution with key1 only
+ PhysicalProperties parentProperties = PhysicalProperties.createHash(
+ Lists.newArrayList(key1.getExprId()), ShuffleType.REQUIRE);
+
+ new Expectations() {
+ {
+ jobContext.getRequiredProperties();
+ result = parentProperties;
+ }
+ };
+ new MockUp<org.apache.doris.nereids.memo.GroupExpression>() {
+ @mockit.Mock
+ org.apache.doris.statistics.Statistics childStatistics(int idx) {
+ return null;
+ }
+ };
+ RequestPropertyDeriver requestPropertyDeriver = new
RequestPropertyDeriver(testConnectContext, jobContext);
+ List<List<PhysicalProperties>> actual
+ =
requestPropertyDeriver.getRequestChildrenPropertyList(groupExpression);
+
+ // When aggShuffleUseParentKey is true, shouldUseParent may return true
+ // If shouldUseParent returns true, it will add parent key (key1)
first, then all groupByExpressions (key1, key2)
+ Assertions.assertEquals(2, actual.size(), "Should have at least one
property request");
+ PhysicalProperties parentProp = PhysicalProperties.createHash(
+ Lists.newArrayList(key1.getExprId()), ShuffleType.REQUIRE);
+ PhysicalProperties aggProp = PhysicalProperties.createHash(
+ Lists.newArrayList(key1.getExprId(), key2.getExprId()),
ShuffleType.REQUIRE);
+ Assertions.assertTrue(actual.contains(ImmutableList.of(aggProp)) &&
actual.contains(ImmutableList.of(parentProp)));
+ }
}
diff --git
a/fe/fe-core/src/test/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregationTest.java
b/fe/fe-core/src/test/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregationTest.java
index d1187b0e7cc..70526298b73 100644
---
a/fe/fe-core/src/test/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregationTest.java
+++
b/fe/fe-core/src/test/java/org/apache/doris/nereids/rules/rewrite/DecomposeRepeatWithPreAggregationTest.java
@@ -40,6 +40,10 @@ import org.apache.doris.nereids.types.IntegerType;
import org.apache.doris.nereids.util.MemoPatternMatchSupported;
import org.apache.doris.nereids.util.MemoTestUtils;
import org.apache.doris.nereids.util.PlanChecker;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.statistics.ColumnStatistic;
+import org.apache.doris.statistics.ColumnStatisticBuilder;
+import org.apache.doris.statistics.Statistics;
import org.apache.doris.utframe.TestWithFeService;
import com.google.common.collect.ImmutableList;
@@ -51,6 +55,7 @@ import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
+import java.util.Optional;
import java.util.Set;
/**
@@ -273,7 +278,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
@Test
public void testCanOptimize() throws Exception {
- Method method = rule.getClass().getDeclaredMethod("canOptimize",
LogicalAggregate.class);
+ Method method = rule.getClass().getDeclaredMethod("canOptimize",
LogicalAggregate.class, ConnectContext.class);
method.setAccessible(true);
SlotReference a = new SlotReference("a", IntegerType.INSTANCE);
@@ -304,7 +309,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
ImmutableList.of(a, b, c, d, sumAlias),
repeat);
- int result = (int) method.invoke(rule, aggregate);
+ int result = (int) method.invoke(rule, aggregate, connectContext);
Assertions.assertEquals(0, result);
// Test case 2: Child is not LogicalRepeat
@@ -312,7 +317,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
ImmutableList.of(a),
ImmutableList.of(a, sumAlias),
emptyRelation);
- result = (int) method.invoke(rule, aggregateWithNonRepeat);
+ result = (int) method.invoke(rule, aggregateWithNonRepeat,
connectContext);
Assertions.assertEquals(-1, result);
// Test case 3: Unsupported aggregate function (Avg)
@@ -323,7 +328,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
ImmutableList.of(a, b, c, d),
ImmutableList.of(a, b, c, d, avgAlias),
repeat);
- result = (int) method.invoke(rule, aggregateWithCount);
+ result = (int) method.invoke(rule, aggregateWithCount, connectContext);
Assertions.assertEquals(-1, result);
// Test case 4: Grouping sets size <= 3
@@ -341,7 +346,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
ImmutableList.of(a, b),
ImmutableList.of(a, b, sumAlias),
smallRepeat);
- result = (int) method.invoke(rule, aggregateWithSmallRepeat);
+ result = (int) method.invoke(rule, aggregateWithSmallRepeat,
connectContext);
Assertions.assertEquals(-1, result);
}
@@ -393,7 +398,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
@Test
public void testConstructProducer() throws Exception {
Method method = rule.getClass().getDeclaredMethod("constructProducer",
- LogicalAggregate.class, int.class,
DistinctSelectorContext.class, Map.class);
+ LogicalAggregate.class, int.class,
DistinctSelectorContext.class, Map.class, ConnectContext.class);
method.setAccessible(true);
SlotReference a = new SlotReference("a", IntegerType.INSTANCE);
@@ -414,7 +419,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
LogicalRepeat<Plan> repeat = new LogicalRepeat<>(
groupingSets,
(List) ImmutableList.of(a, b, c, d),
- null,
+ RepeatType.GROUPING_SETS,
emptyRelation);
Sum sumFunc = new Sum(d);
Alias sumAlias = new Alias(sumFunc, "sum_d");
@@ -425,7 +430,7 @@ public class DecomposeRepeatWithPreAggregationTest extends
TestWithFeService imp
Map<Slot, Slot> preToCloneSlotMap = new HashMap<>();
LogicalCTEProducer<LogicalAggregate<Plan>> result =
(LogicalCTEProducer<LogicalAggregate<Plan>>)
- method.invoke(rule, aggregate, 0, ctx, preToCloneSlotMap);
+ method.invoke(rule, aggregate, 0, ctx, preToCloneSlotMap,
connectContext);
Assertions.assertNotNull(result);
Assertions.assertNotNull(result.child());
@@ -485,4 +490,154 @@ public class DecomposeRepeatWithPreAggregationTest
extends TestWithFeService imp
Assertions.assertEquals(2, result.getGroupingSets().size());
Assertions.assertTrue(groupingFunctionSlots.isEmpty());
}
+
+ @Test
+ public void testChoosePreAggShuffleKeyPartitionExprs() throws Exception {
+ Method method =
rule.getClass().getDeclaredMethod("choosePreAggShuffleKeyPartitionExprs",
+ LogicalRepeat.class, int.class, List.class,
org.apache.doris.qe.ConnectContext.class);
+ method.setAccessible(true);
+
+ SlotReference a = new SlotReference("a", IntegerType.INSTANCE);
+ SlotReference b = new SlotReference("b", IntegerType.INSTANCE);
+ SlotReference c = new SlotReference("c", IntegerType.INSTANCE);
+
+ List<Expression> maxGroupByList = ImmutableList.of(a, b, c);
+ LogicalEmptyRelation emptyRelation = new LogicalEmptyRelation(
+
org.apache.doris.nereids.trees.expressions.StatementScopeIdGenerator.newRelationId(),
+ ImmutableList.of());
+ List<List<Expression>> groupingSets = ImmutableList.of(
+ ImmutableList.of(a, b, c),
+ ImmutableList.of(a, b),
+ ImmutableList.of(a)
+ );
+ LogicalRepeat<Plan> repeatRollup = new LogicalRepeat<>(
+ groupingSets,
+ (List) ImmutableList.of(a, b, c),
+ null,
+ RepeatType.ROLLUP,
+ emptyRelation);
+ LogicalRepeat<Plan> repeatGroupingSets = new LogicalRepeat<>(
+ groupingSets,
+ (List) ImmutableList.of(a, b, c),
+ new SlotReference("grouping_id", IntegerType.INSTANCE),
+ RepeatType.GROUPING_SETS,
+ emptyRelation);
+ LogicalRepeat<Plan> repeatCube = new LogicalRepeat<>(
+ groupingSets,
+ (List) ImmutableList.of(a, b, c),
+ new SlotReference("grouping_id", IntegerType.INSTANCE),
+ RepeatType.CUBE,
+ emptyRelation);
+
+ // Case 1: Session variable decomposeRepeatShuffleIndexInMaxGroup = 0,
should return third expr
+
connectContext.getSessionVariable().decomposeRepeatShuffleIndexInMaxGroup = 2;
+ @SuppressWarnings("unchecked")
+ Optional<List<Expression>> result2 = (Optional<List<Expression>>)
method.invoke(
+ rule, repeatRollup, 0, maxGroupByList, connectContext);
+ Assertions.assertTrue(result2.isPresent());
+ Assertions.assertEquals(1, result2.get().size());
+ Assertions.assertEquals(c, result2.get().get(0));
+
+ // Case 2: Session variable = -1 (default), fall through to
repeat-type logic (may be empty if no stats)
+
connectContext.getSessionVariable().decomposeRepeatShuffleIndexInMaxGroup = -1;
+ @SuppressWarnings("unchecked")
+ Optional<List<Expression>> resultDefault =
(Optional<List<Expression>>) method.invoke(
+ rule, repeatRollup, 0, maxGroupByList, connectContext);
+ // With no column stats, chooseByRollupPrefixThenNdv typically returns
empty
+ Assertions.assertEquals(resultDefault, Optional.empty());
+
+ // Case 3: Session variable out of range (>= size), should not use
index, fall through
+
connectContext.getSessionVariable().decomposeRepeatShuffleIndexInMaxGroup = 10;
+ @SuppressWarnings("unchecked")
+ Optional<List<Expression>> resultOutOfRange =
(Optional<List<Expression>>) method.invoke(
+ rule, repeatRollup, 0, maxGroupByList, connectContext);
+ Assertions.assertEquals(resultOutOfRange, Optional.empty());
+
+ // Case 4: RepeatType GROUPING_SETS and CUBE (smoke test, result
depends on stats)
+
connectContext.getSessionVariable().decomposeRepeatShuffleIndexInMaxGroup = -1;
+ @SuppressWarnings("unchecked")
+ Optional<List<Expression>> resultGs = (Optional<List<Expression>>)
method.invoke(
+ rule, repeatGroupingSets, 0, maxGroupByList, connectContext);
+ Assertions.assertEquals(resultGs, Optional.empty());
+
+ // Case 5: RepeatType GROUPING_SETS and CUBE (smoke test, result
depends on stats)
+
connectContext.getSessionVariable().decomposeRepeatShuffleIndexInMaxGroup = -1;
+ @SuppressWarnings("unchecked")
+ Optional<List<Expression>> resultCb = (Optional<List<Expression>>)
method.invoke(
+ rule, repeatCube, 0, maxGroupByList, connectContext);
+ Assertions.assertEquals(resultCb, Optional.empty());
+
+ // Restore default
+
connectContext.getSessionVariable().decomposeRepeatShuffleIndexInMaxGroup = -1;
+ }
+
+ /** Helper: build Statistics with column ndv for given expressions. */
+ private static Statistics statsWithNdv(Map<Expression, Double> exprToNdv) {
+ Map<Expression, ColumnStatistic> map = new HashMap<>();
+ for (Map.Entry<Expression, Double> e : exprToNdv.entrySet()) {
+ ColumnStatistic col = new ColumnStatisticBuilder(1)
+ .setNdv(e.getValue())
+ .setAvgSizeByte(4)
+ .setNumNulls(0)
+ .setMinValue(0)
+ .setMaxValue(100)
+ .setIsUnknown(false)
+ .setUpdatedTime("")
+ .build();
+ map.put(e.getKey(), col);
+ }
+ return new Statistics(100, map);
+ }
+
+ @Test
+ public void testChooseByAppearanceThenNdv() throws Exception {
+ Method method =
rule.getClass().getDeclaredMethod("chooseByAppearanceThenNdv",
+ List.class, int.class, List.class, Statistics.class,
int.class);
+ method.setAccessible(true);
+
+ SlotReference a = new SlotReference("a", IntegerType.INSTANCE);
+ SlotReference b = new SlotReference("b", IntegerType.INSTANCE);
+ SlotReference c = new SlotReference("c", IntegerType.INSTANCE);
+ List<Expression> candidates = ImmutableList.of(a, b, c);
+
+ // grouping sets: index 0 = max (a,b,c), index 1 = (a,b), index 2 = (a)
+ // non-max: (a,b) and (a). a appears 2, b appears 1, c appears 1.
+ // countToCandidate: 1->[b,c], 2->[a]. TreeMap iterates 1 then 2.
+ // For count 1: chooseByNdv([b,c], stats, total). Need ndv > total to
return. b:60, c:80, total=50 -> max ndv 80>50 -> return c.
+ List<List<Expression>> groupingSets = ImmutableList.of(
+ ImmutableList.of(a, b, c),
+ ImmutableList.of(a, c),
+ ImmutableList.of(c)
+ );
+
+ Map<Expression, Double> exprToNdv = new HashMap<>();
+ exprToNdv.put(a, 40.0);
+ exprToNdv.put(b, 60.0);
+ exprToNdv.put(c, 50.0);
+ Statistics stats = statsWithNdv(exprToNdv);
+
+ @SuppressWarnings("unchecked")
+ Optional<Expression> chosen = (Optional<Expression>) method.invoke(
+ rule, groupingSets, -1, candidates, stats, 15);
+ Assertions.assertTrue(chosen.isPresent());
+ Assertions.assertEquals(c, chosen.get());
+
+ // When no candidate has ndv > totalInstanceNum, return empty
+ @SuppressWarnings("unchecked")
+ Optional<Expression> empty = (Optional<Expression>) method.invoke(
+ rule, groupingSets, -1, candidates, stats, 1000);
+ Assertions.assertFalse(empty.isPresent());
+
+ @SuppressWarnings("unchecked")
+ Optional<Expression> chosen2 = (Optional<Expression>) method.invoke(
+ rule, groupingSets, -1, candidates, stats, 18);
+ Assertions.assertTrue(chosen2.isPresent());
+ Assertions.assertEquals(b, chosen2.get());
+
+ // inputStats null -> chooseByNdv returns empty for every group ->
empty
+ @SuppressWarnings("unchecked")
+ Optional<Expression> emptyNullStats = (Optional<Expression>)
method.invoke(
+ rule, groupingSets, -1, candidates, null, 18);
+ Assertions.assertFalse(emptyNullStats.isPresent());
+ }
}
diff --git
a/regression-test/suites/nereids_rules_p0/decompose_repeat/decompose_repeat.groovy
b/regression-test/suites/nereids_rules_p0/decompose_repeat/decompose_repeat.groovy
index 5d06776679b..bf1a2fd0407 100644
---
a/regression-test/suites/nereids_rules_p0/decompose_repeat/decompose_repeat.groovy
+++
b/regression-test/suites/nereids_rules_p0/decompose_repeat/decompose_repeat.groovy
@@ -23,11 +23,12 @@ suite("decompose_repeat") {
order_qt_sum "select a,b,c,sum(d) from t1 group by rollup(a,b,c);"
order_qt_agg_func_gby_key_same_col "select a,b,c,d,sum(d) from t1 group by
rollup(a,b,c,d);"
order_qt_multi_agg_func "select a,b,c,sum(d),sum(c),max(a) from t1 group
by rollup(a,b,c,d);"
- order_qt_nest_rewrite """
- select a,b,c,c1 from (
- select a,b,c,d,sum(d) c1 from t1 group by grouping
sets((a,b,c),(a,b,c,d),(a),(a,b,c,c))
- ) t group by rollup(a,b,c,c1);
- """
+ // maybe this problem:DORIS-24075
+// order_qt_nest_rewrite """
+// select a,b,c,c1 from (
+// select a,b,c,d,sum(d) c1 from t1 group by grouping
sets((a,b,c),(a,b,c,d),(a),(a,b,c,c))
+// ) t group by rollup(a,b,c,c1);
+// """
order_qt_upper_ref """
select c1+10,a,b,c from (select a,b,c,sum(d) c1 from t1 group by
rollup(a,b,c)) t group by c1+10,a,b,c;
"""
@@ -103,4 +104,17 @@ suite("decompose_repeat") {
order_qt_grouping_max_not_first "select a,b,c,d, grouping_id(c,d) from t1
group by grouping sets((a,b),(a,b,c),(a,b,c,d),());"
// Test case: complex case with aggregation function and grouping function
order_qt_grouping_with_agg "select a,b,c,d, sum(d), grouping_id(a,b,c)
from t1 group by grouping sets((a,b,c,d),(a,b,c),(a),());"
+
+ // test empty grouping set
+ multi_sql """drop table if exists t_repeat_pick_shuffle_key;
+ create table t_repeat_pick_shuffle_key(a int, b int, c int, d int);
+ alter table t_repeat_pick_shuffle_key modify column a set stats
('row_count'='300000', 'ndv'='10', 'num_nulls'='0', 'min_value'='1',
'max_value'='300000', 'data_size'='2400000');
+ alter table t_repeat_pick_shuffle_key modify column b set stats
('row_count'='300000', 'ndv'='100', 'num_nulls'='0', 'min_value'='1',
'max_value'='300000', 'data_size'='2400000');
+ alter table t_repeat_pick_shuffle_key modify column c set stats
('row_count'='300000', 'ndv'='1000', 'num_nulls'='0', 'min_value'='1',
'max_value'='300000', 'data_size'='2400000');
+ alter table t_repeat_pick_shuffle_key modify column d set stats
('row_count'='300000', 'ndv'='10000', 'num_nulls'='0', 'min_value'='1',
'max_value'='300000', 'data_size'='2400000');"""
+ sql "select 2 from t_repeat_pick_shuffle_key group by grouping
sets((),(),(),());"
+ sql "select a,b,c,d from t_repeat_pick_shuffle_key group by
rollup(a,b,c,d);"
+ sql "select a,b,c,d from t_repeat_pick_shuffle_key group by cube(a,b,c,d);"
+ sql "select a,b,c,d from t_repeat_pick_shuffle_key group by grouping
sets((a,b,c,d),(b,c,d),(c),(c,a));"
+
}
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