| /* |
| * 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.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.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.db.queryengine.plan.statement.component.Ordering; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.apache.tsfile.utils.ReadWriteIOUtils; |
| |
| import javax.annotation.Nullable; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.Objects; |
| |
| /** |
| * SeriesScanNode is responsible for read data a specific series. When reading data, the |
| * SeriesScanNode can read the raw data batch by batch. And also, it can leverage the filter and |
| * other info to decrease the result set. |
| * |
| * <p>Children type: no child is allowed for SeriesScanNode |
| */ |
| public class SeriesScanNode extends SeriesScanSourceNode { |
| |
| // The path of the target series which will be scanned. |
| private final MeasurementPath seriesPath; |
| |
| public SeriesScanNode(PlanNodeId id, MeasurementPath seriesPath) { |
| super(id); |
| this.seriesPath = seriesPath; |
| } |
| |
| public SeriesScanNode(PlanNodeId id, MeasurementPath seriesPath, Ordering scanOrder) { |
| super(id, scanOrder); |
| this.seriesPath = seriesPath; |
| } |
| |
| public SeriesScanNode( |
| PlanNodeId id, |
| MeasurementPath seriesPath, |
| Ordering scanOrder, |
| long pushDownLimit, |
| long pushDownOffset, |
| TRegionReplicaSet dataRegionReplicaSet) { |
| super(id, scanOrder, pushDownLimit, pushDownOffset, dataRegionReplicaSet); |
| this.seriesPath = seriesPath; |
| } |
| |
| public SeriesScanNode( |
| PlanNodeId id, |
| MeasurementPath seriesPath, |
| Ordering scanOrder, |
| @Nullable Expression pushDownPredicate, |
| long pushDownLimit, |
| long pushDownOffset, |
| TRegionReplicaSet dataRegionReplicaSet) { |
| super(id, scanOrder, pushDownPredicate, pushDownLimit, pushDownOffset, dataRegionReplicaSet); |
| this.seriesPath = seriesPath; |
| } |
| |
| public MeasurementPath getSeriesPath() { |
| return seriesPath; |
| } |
| |
| @Override |
| public PlanNodeType getType() { |
| return PlanNodeType.SERIES_SCAN; |
| } |
| |
| @Override |
| public PlanNode clone() { |
| return new SeriesScanNode( |
| getPlanNodeId(), |
| getSeriesPath(), |
| getScanOrder(), |
| getPushDownPredicate(), |
| getPushDownLimit(), |
| getPushDownOffset(), |
| getRegionReplicaSet()); |
| } |
| |
| @Override |
| public List<String> getOutputColumnNames() { |
| return ImmutableList.of(seriesPath.getFullPath()); |
| } |
| |
| @Override |
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { |
| return visitor.visitSeriesScan(this, context); |
| } |
| |
| @Override |
| protected void serializeAttributes(ByteBuffer byteBuffer) { |
| PlanNodeType.SERIES_SCAN.serialize(byteBuffer); |
| seriesPath.serialize(byteBuffer); |
| ReadWriteIOUtils.write(scanOrder.ordinal(), byteBuffer); |
| if (pushDownPredicate == null) { |
| ReadWriteIOUtils.write((byte) 0, byteBuffer); |
| } else { |
| ReadWriteIOUtils.write((byte) 1, byteBuffer); |
| Expression.serialize(pushDownPredicate, byteBuffer); |
| } |
| ReadWriteIOUtils.write(pushDownLimit, byteBuffer); |
| ReadWriteIOUtils.write(pushDownOffset, byteBuffer); |
| } |
| |
| @Override |
| protected void serializeAttributes(DataOutputStream stream) throws IOException { |
| PlanNodeType.SERIES_SCAN.serialize(stream); |
| seriesPath.serialize(stream); |
| ReadWriteIOUtils.write(scanOrder.ordinal(), stream); |
| if (pushDownPredicate == null) { |
| ReadWriteIOUtils.write((byte) 0, stream); |
| } else { |
| ReadWriteIOUtils.write((byte) 1, stream); |
| Expression.serialize(pushDownPredicate, stream); |
| } |
| ReadWriteIOUtils.write(pushDownLimit, stream); |
| ReadWriteIOUtils.write(pushDownOffset, stream); |
| } |
| |
| public static SeriesScanNode deserialize(ByteBuffer byteBuffer) { |
| MeasurementPath partialPath = (MeasurementPath) PathDeserializeUtil.deserialize(byteBuffer); |
| Ordering scanOrder = Ordering.values()[ReadWriteIOUtils.readInt(byteBuffer)]; |
| byte isNull = ReadWriteIOUtils.readByte(byteBuffer); |
| Expression pushDownPredicate = null; |
| if (isNull == 1) { |
| pushDownPredicate = Expression.deserialize(byteBuffer); |
| } |
| long limit = ReadWriteIOUtils.readLong(byteBuffer); |
| long offset = ReadWriteIOUtils.readLong(byteBuffer); |
| PlanNodeId planNodeId = PlanNodeId.deserialize(byteBuffer); |
| return new SeriesScanNode( |
| planNodeId, partialPath, scanOrder, pushDownPredicate, limit, offset, null); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format( |
| "SeriesScanNode-%s:[SeriesPath: %s, DataRegion: %s]", |
| this.getPlanNodeId(), |
| this.getSeriesPath(), |
| PlanNodeUtil.printRegionReplicaSet(getRegionReplicaSet())); |
| } |
| |
| @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; |
| } |
| SeriesScanNode that = (SeriesScanNode) o; |
| return seriesPath.equals(that.seriesPath); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(super.hashCode(), seriesPath); |
| } |
| |
| @Override |
| public PartialPath getPartitionPath() { |
| return getSeriesPath(); |
| } |
| } |