liuminghui233 commented on code in PR #11859: URL: https://github.com/apache/iotdb/pull/11859#discussion_r1505485304
########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/optimization/PredicatePushDown.java: ########## @@ -0,0 +1,439 @@ +/* + * 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.iotdb.db.queryengine.plan.optimization; + +import org.apache.iotdb.commons.path.PartialPath; +import org.apache.iotdb.db.queryengine.common.MPPQueryContext; +import org.apache.iotdb.db.queryengine.common.QueryId; +import org.apache.iotdb.db.queryengine.plan.analyze.Analysis; +import org.apache.iotdb.db.queryengine.plan.analyze.ExpressionAnalyzer; +import org.apache.iotdb.db.queryengine.plan.analyze.PredicateUtils; +import org.apache.iotdb.db.queryengine.plan.analyze.TemplatedInfo; +import org.apache.iotdb.db.queryengine.plan.expression.Expression; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.FilterNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.MultiChildProcessNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.ProjectNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.SingleChildProcessNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.TransformNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.FullOuterTimeJoinNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.InnerTimeJoinNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.LeftOuterTimeJoinNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.AlignedSeriesScanNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanSourceNode; +import org.apache.iotdb.db.queryengine.plan.statement.StatementType; +import org.apache.iotdb.db.queryengine.plan.statement.component.Ordering; +import org.apache.iotdb.db.queryengine.plan.statement.crud.QueryStatement; + +import java.util.ArrayList; +import java.util.List; + +import static com.google.common.base.Preconditions.checkArgument; +import static com.google.common.base.Preconditions.checkState; + +public class PredicatePushDown implements PlanOptimizer { + + @Override + public PlanNode optimize(PlanNode plan, Analysis analysis, MPPQueryContext context) { + if (analysis.getStatement().getType() != StatementType.QUERY) { + return plan; + } + QueryStatement queryStatement = (QueryStatement) analysis.getStatement(); + if (queryStatement.isLastQuery() || !analysis.hasValueFilter()) { + return plan; + } + return plan.accept( + new Rewriter(), + new RewriterContext( + context.getQueryId(), + queryStatement.isAlignByDevice(), + analysis.isAllDevicesInOneTemplate(), + context.getTypeProvider().getTemplatedInfo())); + } + + private static class Rewriter extends PlanVisitor<PlanNode, RewriterContext> { + + @Override + public PlanNode visitPlan(PlanNode node, RewriterContext context) { + throw new IllegalArgumentException("Unexpected plan node: " + node); + } + + @Override + public PlanNode visitSingleChildProcess(SingleChildProcessNode node, RewriterContext context) { + PlanNode rewrittenChild = node.getChild().accept(this, context); + node.setChild(rewrittenChild); + return node; + } + + @Override + public PlanNode visitMultiChildProcess(MultiChildProcessNode node, RewriterContext context) { + List<PlanNode> rewrittenChildren = new ArrayList<>(); + for (PlanNode child : node.getChildren()) { + rewrittenChildren.add(child.accept(this, context)); + } + node.setChildren(rewrittenChildren); + return node; + } + + @Override + public PlanNode visitFilter(FilterNode node, RewriterContext context) { + if (fromHaving(node.getPredicate())) { + return visitSingleChildProcess(node, context); + } + + context.setPushDownFilterNode(node); + PlanNode rewrittenChild = node.getChild().accept(this, context); + + boolean enablePushDown = context.isEnablePushDown(); + context.reset(); + + if (enablePushDown) { + return rewrittenChild; + } + return node; + } + + private boolean fromHaving(Expression predicate) { + List<Expression> aggregations = ExpressionAnalyzer.searchAggregationExpressions(predicate); + return aggregations != null && !aggregations.isEmpty(); + } + + @Override + public PlanNode visitFullOuterTimeJoin(FullOuterTimeJoinNode node, RewriterContext context) { + if (context.hasNotInheritedPredicate()) { + return node; + } + if (context.isBuildPlanUseTemplate()) { + // only support push down to aligned scan + return node; + } + + Expression inheritedPredicate = context.getInheritedPredicate(); + List<Expression> conjuncts = PredicateUtils.extractConjuncts(inheritedPredicate); + + List<PlanNode> children = node.getChildren(); + + List<List<Expression>> pushDownConjunctsForEachChild = new ArrayList<>(children.size()); Review Comment: done ########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/optimization/PredicatePushDown.java: ########## @@ -0,0 +1,439 @@ +/* + * 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.iotdb.db.queryengine.plan.optimization; + +import org.apache.iotdb.commons.path.PartialPath; +import org.apache.iotdb.db.queryengine.common.MPPQueryContext; +import org.apache.iotdb.db.queryengine.common.QueryId; +import org.apache.iotdb.db.queryengine.plan.analyze.Analysis; +import org.apache.iotdb.db.queryengine.plan.analyze.ExpressionAnalyzer; +import org.apache.iotdb.db.queryengine.plan.analyze.PredicateUtils; +import org.apache.iotdb.db.queryengine.plan.analyze.TemplatedInfo; +import org.apache.iotdb.db.queryengine.plan.expression.Expression; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.FilterNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.MultiChildProcessNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.ProjectNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.SingleChildProcessNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.TransformNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.FullOuterTimeJoinNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.InnerTimeJoinNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.LeftOuterTimeJoinNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.AlignedSeriesScanNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanSourceNode; +import org.apache.iotdb.db.queryengine.plan.statement.StatementType; +import org.apache.iotdb.db.queryengine.plan.statement.component.Ordering; +import org.apache.iotdb.db.queryengine.plan.statement.crud.QueryStatement; + +import java.util.ArrayList; +import java.util.List; + +import static com.google.common.base.Preconditions.checkArgument; +import static com.google.common.base.Preconditions.checkState; + +public class PredicatePushDown implements PlanOptimizer { + + @Override + public PlanNode optimize(PlanNode plan, Analysis analysis, MPPQueryContext context) { + if (analysis.getStatement().getType() != StatementType.QUERY) { + return plan; + } + QueryStatement queryStatement = (QueryStatement) analysis.getStatement(); + if (queryStatement.isLastQuery() || !analysis.hasValueFilter()) { + return plan; + } + return plan.accept( + new Rewriter(), + new RewriterContext( + context.getQueryId(), + queryStatement.isAlignByDevice(), + analysis.isAllDevicesInOneTemplate(), + context.getTypeProvider().getTemplatedInfo())); + } + + private static class Rewriter extends PlanVisitor<PlanNode, RewriterContext> { + + @Override + public PlanNode visitPlan(PlanNode node, RewriterContext context) { + throw new IllegalArgumentException("Unexpected plan node: " + node); + } + + @Override + public PlanNode visitSingleChildProcess(SingleChildProcessNode node, RewriterContext context) { + PlanNode rewrittenChild = node.getChild().accept(this, context); + node.setChild(rewrittenChild); + return node; + } + + @Override + public PlanNode visitMultiChildProcess(MultiChildProcessNode node, RewriterContext context) { + List<PlanNode> rewrittenChildren = new ArrayList<>(); + for (PlanNode child : node.getChildren()) { + rewrittenChildren.add(child.accept(this, context)); + } + node.setChildren(rewrittenChildren); + return node; + } + + @Override + public PlanNode visitFilter(FilterNode node, RewriterContext context) { + if (fromHaving(node.getPredicate())) { + return visitSingleChildProcess(node, context); + } + + context.setPushDownFilterNode(node); + PlanNode rewrittenChild = node.getChild().accept(this, context); + + boolean enablePushDown = context.isEnablePushDown(); + context.reset(); + + if (enablePushDown) { + return rewrittenChild; + } + return node; + } + + private boolean fromHaving(Expression predicate) { Review Comment: done -- This is an automated message from the Apache Git Service. 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