Young-Leo commented on code in PR #16228: URL: https://github.com/apache/iotdb/pull/16228#discussion_r2312344016
########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/planner/PlanMemoryEstimator.java: ########## @@ -0,0 +1,719 @@ +/* + * 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.relational.planner; + +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor; +import org.apache.iotdb.db.queryengine.plan.relational.planner.iterative.GroupReference; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.AggregationNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.AggregationTableScanNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.ApplyNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.CorrelatedJoinNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.DeviceTableScanNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.FilterNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.GroupNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.JoinNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.LimitNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.LinearFillNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.OffsetNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.OutputNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.PatternRecognitionNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.PreviousFillNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.ProjectNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.SemiJoinNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.SortNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.TableFunctionNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.TableFunctionProcessorNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.TopKNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.TreeDeviceViewScanNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.ValueFillNode; +import org.apache.iotdb.db.queryengine.plan.relational.planner.node.WindowNode; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.ArithmeticBinaryExpression; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.ArithmeticUnaryExpression; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.AstVisitor; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.BetweenPredicate; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.ComparisonExpression; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.Expression; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.FunctionCall; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.InPredicate; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.Literal; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.LogicalExpression; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.Node; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.NotExpression; +import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.SymbolReference; + +import org.apache.tsfile.utils.RamUsageEstimator; + +import java.util.IdentityHashMap; +import java.util.List; +import java.util.Optional; + +import static java.util.Objects.requireNonNull; + +public final class PlanMemoryEstimator { + /** estimate the memory usage (in bytes) of the entire plan tree */ + public static long estimatePlan(final PlanNode root) { + requireNonNull(root, "root is null"); + Seen seen = new Seen(); + return new PlanSizer(seen).process(root, null); + } + + public static long estimateExpression(Expression e) { + if (e == null) return 0L; + Seen seen = new Seen(); + ExpressionSizer sz = new ExpressionSizer(seen); + return sz.process(e, null); + } + + private static final class Seen { + private final IdentityHashMap<Object, Boolean> visited = new IdentityHashMap<>(); + + boolean mark(Object o) { + if (o == null) return false; + // TRUE indicates the first occurrence and should be counted + return visited.put(o, Boolean.TRUE) == null; + } + } + + /* ========================== Expression Sizer =========================== */ + + private static final class ExpressionSizer extends AstVisitor<Long, Void> { + private final Seen seen; + + ExpressionSizer(Seen seen) { + this.seen = seen; + } + + private long sizeOfExpr(Expression e) { + if (e == null || !seen.mark(e)) return 0L; + long size = RamUsageEstimator.shallowSizeOfInstance(e.getClass()); + return size + process(e, null); + } + + @Override + protected Long visitNode(Node node, Void ctx) { + throw new UnsupportedOperationException( + "[ExpressionSizer] Unhandled node type: " + node.getClass().getName()); + + // return node == null || !seen.mark(node) ? 0L : RamUsageEstimator.sizeOfObject(node); Review Comment: Removed -- This is an automated message from the Apache Git Service. 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