shizy818 commented on code in PR #16353: URL: https://github.com/apache/iotdb/pull/16353#discussion_r2645262124
########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/source/relational/CteScanOperator.java: ########## @@ -0,0 +1,134 @@ +/* + * + * * 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.execution.operator.source.relational; + +import org.apache.iotdb.commons.utils.TestOnly; +import org.apache.iotdb.db.queryengine.execution.MemoryEstimationHelper; +import org.apache.iotdb.db.queryengine.execution.operator.OperatorContext; +import org.apache.iotdb.db.queryengine.execution.operator.source.SourceOperator; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId; +import org.apache.iotdb.db.utils.cte.CteDataReader; +import org.apache.iotdb.db.utils.cte.CteDataStore; +import org.apache.iotdb.db.utils.cte.MemoryReader; + +import org.apache.tsfile.read.common.block.TsBlock; +import org.apache.tsfile.utils.RamUsageEstimator; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class CteScanOperator implements SourceOperator { + private static final Logger LOGGER = LoggerFactory.getLogger(CteScanOperator.class); + private static final long INSTANCE_SIZE = + RamUsageEstimator.shallowSizeOfInstance(CteScanOperator.class); + + private final OperatorContext operatorContext; + private final PlanNodeId sourceId; + + private final CteDataStore dataStore; + private final CteDataReader dataReader; + private final int dataStoreRefCount; + + public CteScanOperator( + OperatorContext operatorContext, PlanNodeId sourceId, CteDataStore dataStore) { + this.operatorContext = operatorContext; + this.sourceId = sourceId; + this.dataStore = dataStore; + this.dataReader = new MemoryReader(dataStore.getCachedData()); + this.dataStoreRefCount = dataStore.increaseRefCount(); + } + + @Override + public TsBlock next() throws Exception { + if (dataReader == null) { + return null; + } + return dataReader.next(); + } + + @Override + public boolean hasNext() throws Exception { + if (dataReader == null) { + return false; + } + return dataReader.hasNext(); + } + + @Override + public void close() throws Exception { + try { + if (dataReader != null) { + dataReader.close(); + } + } catch (Exception e) { + LOGGER.error("Fail to close fileChannel", e); + } + } + + @Override + public boolean isFinished() throws Exception { + return !hasNextWithTimer(); + } + + @Override + public long calculateMaxPeekMemory() { + return calculateRetainedSizeAfterCallingNext() + calculateMaxReturnSize(); + } + + @Override + public long calculateMaxReturnSize() { + // The returned object is a reference to TsBlock in CteDataReader + return RamUsageEstimator.NUM_BYTES_OBJECT_REF; Review Comment: done ########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/source/relational/CteScanOperator.java: ########## @@ -0,0 +1,134 @@ +/* + * + * * 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.execution.operator.source.relational; + +import org.apache.iotdb.commons.utils.TestOnly; +import org.apache.iotdb.db.queryengine.execution.MemoryEstimationHelper; +import org.apache.iotdb.db.queryengine.execution.operator.OperatorContext; +import org.apache.iotdb.db.queryengine.execution.operator.source.SourceOperator; +import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId; +import org.apache.iotdb.db.utils.cte.CteDataReader; +import org.apache.iotdb.db.utils.cte.CteDataStore; +import org.apache.iotdb.db.utils.cte.MemoryReader; + +import org.apache.tsfile.read.common.block.TsBlock; +import org.apache.tsfile.utils.RamUsageEstimator; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class CteScanOperator implements SourceOperator { + private static final Logger LOGGER = LoggerFactory.getLogger(CteScanOperator.class); + private static final long INSTANCE_SIZE = + RamUsageEstimator.shallowSizeOfInstance(CteScanOperator.class); + + private final OperatorContext operatorContext; + private final PlanNodeId sourceId; + + private final CteDataStore dataStore; + private final CteDataReader dataReader; + private final int dataStoreRefCount; + + public CteScanOperator( + OperatorContext operatorContext, PlanNodeId sourceId, CteDataStore dataStore) { + this.operatorContext = operatorContext; + this.sourceId = sourceId; + this.dataStore = dataStore; + this.dataReader = new MemoryReader(dataStore.getCachedData()); + this.dataStoreRefCount = dataStore.increaseRefCount(); + } + + @Override + public TsBlock next() throws Exception { + if (dataReader == null) { + return null; + } + return dataReader.next(); + } + + @Override + public boolean hasNext() throws Exception { + if (dataReader == null) { + return false; + } + return dataReader.hasNext(); + } + + @Override + public void close() throws Exception { + try { + if (dataReader != null) { + dataReader.close(); + } + } catch (Exception e) { + LOGGER.error("Fail to close fileChannel", e); + } + } + + @Override + public boolean isFinished() throws Exception { + return !hasNextWithTimer(); + } + + @Override + public long calculateMaxPeekMemory() { + return calculateRetainedSizeAfterCallingNext() + calculateMaxReturnSize(); Review Comment: done -- This is an automated message from the Apache Git Service. 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