Sh-Zh-7 commented on code in PR #16953: URL: https://github.com/apache/iotdb/pull/16953#discussion_r2709508436
########## iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/process/window/RowNumberOperator.java: ########## @@ -0,0 +1,214 @@ +/* + * 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.process.window; + +import org.apache.iotdb.db.queryengine.execution.MemoryEstimationHelper; +import org.apache.iotdb.db.queryengine.execution.operator.Operator; +import org.apache.iotdb.db.queryengine.execution.operator.OperatorContext; +import org.apache.iotdb.db.queryengine.execution.operator.process.ProcessOperator; +import org.apache.iotdb.db.queryengine.execution.operator.source.relational.aggregation.grouped.UpdateMemory; +import org.apache.iotdb.db.queryengine.execution.operator.source.relational.aggregation.grouped.hash.GroupByHash; +import org.apache.iotdb.db.queryengine.plan.relational.type.InternalTypeManager; + +import com.google.common.collect.ImmutableList; +import com.google.common.util.concurrent.ListenableFuture; +import org.apache.tsfile.block.column.Column; +import org.apache.tsfile.block.column.ColumnBuilder; +import org.apache.tsfile.common.conf.TSFileDescriptor; +import org.apache.tsfile.enums.TSDataType; +import org.apache.tsfile.read.common.block.TsBlock; +import org.apache.tsfile.read.common.block.TsBlockBuilder; +import org.apache.tsfile.read.common.block.column.RunLengthEncodedColumn; +import org.apache.tsfile.read.common.type.Type; +import org.apache.tsfile.utils.RamUsageEstimator; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Optional; + +import static org.apache.iotdb.db.queryengine.execution.operator.source.relational.AbstractTableScanOperator.TIME_COLUMN_TEMPLATE; +import static org.apache.iotdb.db.queryengine.execution.operator.source.relational.aggregation.grouped.hash.GroupByHash.createGroupByHash; + +public class RowNumberOperator implements ProcessOperator { + private static final long INSTANCE_SIZE = + RamUsageEstimator.shallowSizeOfInstance(RowNumberOperator.class); + + private final OperatorContext operatorContext; + private final Operator inputOperator; + private final List<Integer> outputChannels; + private final List<Integer> partitionChannels; + private final TsBlockBuilder tsBlockBuilder; + + private final Optional<GroupByHash> groupByHash; + private final Optional<Integer> maxRowsPerPartition; + private final Map<Integer, Long> partitionRowCounts; + + public RowNumberOperator( + OperatorContext operatorContext, + Operator inputOperator, + List<TSDataType> inputDataTypes, + List<Integer> outputChannels, + List<Integer> partitionChannels, + Optional<Integer> maxRowsPerPartition, + int expectedPositions) { + this.operatorContext = operatorContext; + this.inputOperator = inputOperator; + this.outputChannels = ImmutableList.copyOf(outputChannels); + this.partitionChannels = ImmutableList.copyOf(partitionChannels); + this.maxRowsPerPartition = maxRowsPerPartition; + + // Output data types + // original output channels + row number column + List<TSDataType> outputDataTypes = new ArrayList<>(); + for (int channel : outputChannels) { + outputDataTypes.add(inputDataTypes.get(channel)); + } + outputDataTypes.add(TSDataType.INT64); + this.tsBlockBuilder = new TsBlockBuilder(outputDataTypes); + + if (partitionChannels.isEmpty()) { + this.groupByHash = Optional.empty(); + } else { + // Partition data types + List<Type> partitionDataTypes = new ArrayList<>(); + for (int channel : partitionChannels) { + TSDataType tsDataType = inputDataTypes.get(channel); + Type convertType = InternalTypeManager.fromTSDataType(tsDataType); + partitionDataTypes.add(convertType); + } + this.groupByHash = + Optional.of( + createGroupByHash(partitionDataTypes, false, expectedPositions, UpdateMemory.NOOP)); + } + + this.partitionRowCounts = new HashMap<>(expectedPositions); + } + + @Override + public OperatorContext getOperatorContext() { + return operatorContext; + } + + @Override + public TsBlock next() throws Exception { + TsBlock tsBlock = inputOperator.nextWithTimer(); + if (tsBlock == null) { + return null; + } + + int[] partitionIds = getTsBlockPartitionIds(tsBlock); + for (int position = 0; position < tsBlock.getPositionCount(); position++) { + int partitionId = groupByHash.isPresent() ? partitionIds[position] : 0; + long rowCount = partitionRowCounts.getOrDefault(partitionId, 0L); + processRow(tsBlock, partitionId, rowCount + 1); + partitionRowCounts.put(partitionId, rowCount + 1); + } + + TsBlock result = + tsBlockBuilder.build( + new RunLengthEncodedColumn(TIME_COLUMN_TEMPLATE, tsBlockBuilder.getPositionCount())); + tsBlockBuilder.reset(); + return result; + } + + private void processRow(TsBlock tsBlock, int position, long rowNumber) { + // Check max rows per partition limit + if (maxRowsPerPartition.isPresent() && rowNumber >= maxRowsPerPartition.get()) { Review Comment: Fixed. -- This is an automated message from the Apache Git Service. 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