| /* |
| * 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.planner.plan.node.source; |
| |
| import org.apache.iotdb.common.rpc.thrift.TRegionReplicaSet; |
| import org.apache.iotdb.commons.path.MeasurementPath; |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.commons.path.PathDeserializeUtil; |
| import org.apache.iotdb.db.queryengine.common.header.ColumnHeaderConstant; |
| 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.PlanNodeType; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeUtil; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.eclipse.jetty.util.StringUtil; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| public class LastQueryScanNode extends LastSeriesSourceNode { |
| |
| public static final List<String> LAST_QUERY_HEADER_COLUMNS = |
| ImmutableList.of( |
| ColumnHeaderConstant.TIMESERIES, |
| ColumnHeaderConstant.VALUE, |
| ColumnHeaderConstant.DATATYPE); |
| |
| // The path of the target series which will be scanned. |
| private final MeasurementPath seriesPath; |
| |
| private final String outputViewPath; |
| |
| // The id of DataRegion where the node will run |
| private TRegionReplicaSet regionReplicaSet; |
| |
| public LastQueryScanNode(PlanNodeId id, MeasurementPath seriesPath, String outputViewPath) { |
| super(id, new AtomicInteger(1)); |
| this.seriesPath = seriesPath; |
| this.outputViewPath = outputViewPath; |
| } |
| |
| public LastQueryScanNode( |
| PlanNodeId id, |
| MeasurementPath seriesPath, |
| AtomicInteger dataNodeSeriesScanNum, |
| String outputViewPath) { |
| super(id, dataNodeSeriesScanNum); |
| this.seriesPath = seriesPath; |
| this.outputViewPath = outputViewPath; |
| } |
| |
| public LastQueryScanNode( |
| PlanNodeId id, |
| MeasurementPath seriesPath, |
| AtomicInteger dataNodeSeriesScanNum, |
| String outputViewPath, |
| TRegionReplicaSet regionReplicaSet) { |
| super(id, dataNodeSeriesScanNum); |
| this.seriesPath = seriesPath; |
| this.outputViewPath = outputViewPath; |
| this.regionReplicaSet = regionReplicaSet; |
| } |
| |
| @Override |
| public void open() throws Exception {} |
| |
| @Override |
| public TRegionReplicaSet getRegionReplicaSet() { |
| return regionReplicaSet; |
| } |
| |
| @Override |
| public void setRegionReplicaSet(TRegionReplicaSet regionReplicaSet) { |
| this.regionReplicaSet = regionReplicaSet; |
| } |
| |
| public MeasurementPath getSeriesPath() { |
| return seriesPath; |
| } |
| |
| public String getOutputViewPath() { |
| return outputViewPath; |
| } |
| |
| public String getOutputSymbolForSort() { |
| if (outputViewPath != null) { |
| return outputViewPath; |
| } |
| return seriesPath.getFullPath(); |
| } |
| |
| @Override |
| public void close() throws Exception {} |
| |
| @Override |
| public List<PlanNode> getChildren() { |
| return ImmutableList.of(); |
| } |
| |
| @Override |
| public void addChild(PlanNode child) { |
| throw new UnsupportedOperationException("no child is allowed for SeriesScanNode"); |
| } |
| |
| @Override |
| public PlanNodeType getType() { |
| return PlanNodeType.LAST_QUERY_SCAN; |
| } |
| |
| @Override |
| public PlanNode clone() { |
| return new LastQueryScanNode( |
| getPlanNodeId(), seriesPath, getDataNodeSeriesScanNum(), outputViewPath, regionReplicaSet); |
| } |
| |
| @Override |
| public int allowedChildCount() { |
| return NO_CHILD_ALLOWED; |
| } |
| |
| @Override |
| public List<String> getOutputColumnNames() { |
| return LAST_QUERY_HEADER_COLUMNS; |
| } |
| |
| @Override |
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { |
| return visitor.visitLastQueryScan(this, context); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| if (!super.equals(o)) return false; |
| LastQueryScanNode that = (LastQueryScanNode) o; |
| return Objects.equals(seriesPath, that.seriesPath) |
| && Objects.equals(outputViewPath, that.outputViewPath) |
| && Objects.equals(regionReplicaSet, that.regionReplicaSet); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(super.hashCode(), seriesPath, outputViewPath, regionReplicaSet); |
| } |
| |
| @Override |
| public String toString() { |
| if (StringUtil.isNotBlank(outputViewPath)) { |
| return String.format( |
| "LastQueryScanNode-%s:[SeriesPath: %s, ViewPath: %s, DataRegion: %s]", |
| this.getPlanNodeId(), |
| this.getSeriesPath(), |
| this.getOutputViewPath(), |
| PlanNodeUtil.printRegionReplicaSet(getRegionReplicaSet())); |
| } else { |
| return String.format( |
| "LastQueryScanNode-%s:[SeriesPath: %s, DataRegion: %s]", |
| this.getPlanNodeId(), |
| this.getSeriesPath(), |
| PlanNodeUtil.printRegionReplicaSet(getRegionReplicaSet())); |
| } |
| } |
| |
| @Override |
| protected void serializeAttributes(ByteBuffer byteBuffer) { |
| PlanNodeType.LAST_QUERY_SCAN.serialize(byteBuffer); |
| seriesPath.serialize(byteBuffer); |
| ReadWriteIOUtils.write(getDataNodeSeriesScanNum().get(), byteBuffer); |
| ReadWriteIOUtils.write(outputViewPath == null, byteBuffer); |
| if (outputViewPath != null) { |
| ReadWriteIOUtils.write(outputViewPath, byteBuffer); |
| } |
| } |
| |
| @Override |
| protected void serializeAttributes(DataOutputStream stream) throws IOException { |
| PlanNodeType.LAST_QUERY_SCAN.serialize(stream); |
| seriesPath.serialize(stream); |
| ReadWriteIOUtils.write(getDataNodeSeriesScanNum().get(), stream); |
| ReadWriteIOUtils.write(outputViewPath == null, stream); |
| if (outputViewPath != null) { |
| ReadWriteIOUtils.write(outputViewPath, stream); |
| } |
| } |
| |
| public static LastQueryScanNode deserialize(ByteBuffer byteBuffer) { |
| MeasurementPath partialPath = (MeasurementPath) PathDeserializeUtil.deserialize(byteBuffer); |
| int dataNodeSeriesScanNum = ReadWriteIOUtils.readInt(byteBuffer); |
| boolean isNull = ReadWriteIOUtils.readBool(byteBuffer); |
| String outputPathSymbol = isNull ? null : ReadWriteIOUtils.readString(byteBuffer); |
| PlanNodeId planNodeId = PlanNodeId.deserialize(byteBuffer); |
| return new LastQueryScanNode( |
| planNodeId, partialPath, new AtomicInteger(dataNodeSeriesScanNum), outputPathSymbol); |
| } |
| |
| @Override |
| public PartialPath getPartitionPath() { |
| return getSeriesPath(); |
| } |
| |
| public String outputPathSymbol() { |
| if (outputViewPath == null) { |
| return seriesPath.getFullPath(); |
| } else { |
| return outputViewPath; |
| } |
| } |
| } |