Kikyou1997 commented on code in PR #10412:
URL: https://github.com/apache/doris/pull/10412#discussion_r912709466
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/RuleType.java:
##########
@@ -38,6 +38,7 @@ public enum RuleType {
PROJECT_TO_GLOBAL_AGGREGATE(RuleTypeClass.REWRITE),
// rewrite rules
+ AGGREGATE_DISASSEMBLE(RuleTypeClass.REWRITE),
Review Comment:
added TODO
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AggregateDisassemble.java:
##########
@@ -0,0 +1,151 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.nereids.rules.rewrite;
+
+import org.apache.doris.analysis.FunctionName;
+import org.apache.doris.catalog.Catalog;
+import org.apache.doris.catalog.Function;
+import org.apache.doris.catalog.Function.CompareMode;
+import org.apache.doris.catalog.Type;
+import org.apache.doris.nereids.operators.Operator;
+import org.apache.doris.nereids.operators.plans.logical.LogicalAggregate;
+import org.apache.doris.nereids.rules.Rule;
+import org.apache.doris.nereids.rules.RuleType;
+import org.apache.doris.nereids.trees.expressions.Expression;
+import org.apache.doris.nereids.trees.expressions.NamedExpression;
+import org.apache.doris.nereids.trees.expressions.Slot;
+import org.apache.doris.nereids.trees.expressions.functions.AggregateFunction;
+import org.apache.doris.nereids.trees.plans.Plan;
+import org.apache.doris.nereids.types.DataType;
+
+import com.clearspring.analytics.util.Lists;
+import com.google.common.base.Preconditions;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * Used to generate the merge agg node for distributed execution.
+ * Do this in following steps:
+ * 1. clone output expr list, find all agg function
+ * 2. set found agg function intermediaType
+ * 3. create new child plan rooted at new local agg
+ * 4. update the slot referenced by expr of merge agg
+ * 5. create plan rooted at merge agg, return it.
+ */
+public class AggregateDisassemble extends OneRewriteRuleFactory {
+
+ @Override
+ public Rule<Plan> build() {
+ return logicalAggregate().when(p -> {
+ LogicalAggregate logicalAggregation = p.getOperator();
+ return !logicalAggregation.isDisassembled();
+ }).thenApply(ctx -> {
+ Plan plan = ctx.root;
+ Operator operator = plan.getOperator();
+ LogicalAggregate agg = (LogicalAggregate) operator;
+ List<NamedExpression> outputExpressionList =
agg.getOutputExpressionList();
+ List<NamedExpression> intermediateAggExpressionList =
Lists.newArrayList();
+ for (NamedExpression namedExpression : outputExpressionList) {
+ namedExpression = (NamedExpression) namedExpression.clone();
+ List<AggregateFunction> functionCallList =
+
namedExpression.collect(org.apache.doris.catalog.AggregateFunction.class::isInstance);
+ for (AggregateFunction functionCall : functionCallList) {
+ FunctionName functionName = new
FunctionName(functionCall.getName());
+ List<Expression> expressionList =
functionCall.getArguments();
+ List<Type> staleTypeList =
expressionList.stream().map(Expression::getDataType)
+
.map(DataType::toCatalogDataType).collect(Collectors.toList());
+ Function staleFuncDesc = new Function(functionName,
staleTypeList,
+ functionCall.getDataType().toCatalogDataType(),
+ // I think an aggregate function will never have a
variable length parameters
+ false);
+ Function staleFunc = Catalog.getCurrentCatalog()
+ .getFunction(staleFuncDesc,
CompareMode.IS_IDENTICAL);
+ Preconditions.checkArgument(staleFunc instanceof
org.apache.doris.catalog.AggregateFunction);
+ org.apache.doris.catalog.AggregateFunction
+ staleAggFunc =
(org.apache.doris.catalog.AggregateFunction) staleFunc;
+ Type staleIntermediateType =
staleAggFunc.getIntermediateType();
+ Type staleRetType = staleAggFunc.getReturnType();
+ if (staleIntermediateType != null &&
!staleIntermediateType.equals(staleRetType)) {
+
functionCall.setIntermediate(DataType.convertFromCatalogDataType(staleIntermediateType));
+ }
+ }
+ intermediateAggExpressionList.add(namedExpression);
+ }
+ LogicalAggregate localAgg = new LogicalAggregate(
+
agg.getGroupByExprList().stream().map(Expression::clone).collect(Collectors.toList()),
+ intermediateAggExpressionList,
+ true
+ );
+
+ Plan childPlan = plan(localAgg, plan.child(0));
+ List<Slot> stalePlanOutputSlotList = plan.getOutput();
+ List<Slot> childOutputSlotList = childPlan.getOutput();
+ int childOutputSize = stalePlanOutputSlotList.size();
+ Preconditions.checkState(childOutputSize ==
childOutputSlotList.size());
+ Map<Slot, Slot> staleToNew = new HashMap<>();
+ for (int i = 0; i < stalePlanOutputSlotList.size(); i++) {
+ staleToNew.put(stalePlanOutputSlotList.get(i),
childOutputSlotList.get(i));
+ }
+ List<Expression> groupByExpressionList = agg.getGroupByExprList();
+ for (int i = 0; i < groupByExpressionList.size(); i++) {
+ replaceSlot(staleToNew, groupByExpressionList,
groupByExpressionList.get(i), i);
+ }
+ List<NamedExpression> mergeOutputExpressionList =
agg.getOutputExpressionList();
+ for (int i = 0; i < mergeOutputExpressionList.size(); i++) {
+ replaceSlot(staleToNew, mergeOutputExpressionList,
mergeOutputExpressionList.get(i), i);
+ }
+ LogicalAggregate mergeAgg = new LogicalAggregate(
Review Comment:
done
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