| /* |
| * 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.metedata.write.view; |
| |
| import org.apache.iotdb.common.rpc.thrift.TRegionReplicaSet; |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.commons.path.PathDeserializeUtil; |
| import org.apache.iotdb.commons.schema.view.viewExpression.ViewExpression; |
| import org.apache.iotdb.db.conf.IoTDBDescriptor; |
| import org.apache.iotdb.db.queryengine.plan.analyze.Analysis; |
| 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.PlanVisitor; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.node.WritePlanNode; |
| import org.apache.iotdb.db.schemaengine.schemaregion.view.visitor.GetSourcePathsVisitor; |
| import org.apache.iotdb.db.schemaengine.schemaregion.write.req.view.ICreateLogicalViewPlan; |
| |
| import org.apache.tsfile.exception.NotImplementedException; |
| import org.apache.tsfile.utils.ReadWriteIOUtils; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| public class CreateLogicalViewNode extends WritePlanNode implements ICreateLogicalViewPlan { |
| |
| /** |
| * A map from target path to source expression. Yht target path is the name of this logical view, |
| * and the source expression is the data source of this view. |
| */ |
| private Map<PartialPath, ViewExpression> viewPathToSourceMap; |
| |
| /** |
| * This variable will be set in function splitByPartition() according to analysis. And it will be |
| * set when creating new split nodes. |
| */ |
| private TRegionReplicaSet regionReplicaSet = null; |
| |
| public CreateLogicalViewNode( |
| PlanNodeId id, List<PartialPath> paths, List<ViewExpression> expressions) { |
| super(id); |
| this.viewPathToSourceMap = convertTargetAndSourceListsToMap(paths, expressions); |
| } |
| |
| public CreateLogicalViewNode( |
| PlanNodeId id, Map<PartialPath, ViewExpression> viewPathToSourceMap) { |
| super(id); |
| this.viewPathToSourceMap = viewPathToSourceMap; |
| } |
| |
| public CreateLogicalViewNode( |
| PlanNodeId id, |
| Map<PartialPath, ViewExpression> viewPathToSourceMap, |
| TRegionReplicaSet regionReplicaSet) { |
| super(id); |
| this.viewPathToSourceMap = viewPathToSourceMap; |
| this.regionReplicaSet = regionReplicaSet; |
| } |
| |
| protected final Map<PartialPath, ViewExpression> convertTargetAndSourceListsToMap( |
| List<PartialPath> paths, List<ViewExpression> expressions) { |
| if (paths.size() != expressions.size()) { |
| return null; |
| } |
| Map<PartialPath, ViewExpression> result = new HashMap<>(); |
| for (int i = 0; i < paths.size(); i++) { |
| result.put(paths.get(i), expressions.get(i)); |
| } |
| return result; |
| } |
| |
| // region Interfaces in ICreateLogicalViewPlan |
| @Override |
| public int getViewSize() { |
| return this.viewPathToSourceMap.size(); |
| } |
| |
| @Override |
| public Map<PartialPath, ViewExpression> getViewPathToSourceExpressionMap() { |
| return this.viewPathToSourceMap; |
| } |
| |
| @Override |
| public List<PartialPath> getViewPathList() { |
| List<PartialPath> result = new ArrayList<>(this.viewPathToSourceMap.keySet()); |
| return result; |
| } |
| |
| @Override |
| public void setViewPathToSourceExpressionMap( |
| Map<PartialPath, ViewExpression> viewPathToSourceExpressionMap) { |
| this.viewPathToSourceMap = viewPathToSourceExpressionMap; |
| } |
| |
| @Override |
| public <R, C> R accept(PlanVisitor<R, C> visitor, C schemaRegion) { |
| return visitor.visitCreateLogicalView(this, schemaRegion); |
| } |
| // endregion |
| |
| // region Interfaces in WritePlanNode or PlanNode |
| |
| @Override |
| public TRegionReplicaSet getRegionReplicaSet() { |
| return this.regionReplicaSet; |
| } |
| |
| @Override |
| public List<PlanNode> getChildren() { |
| return new ArrayList<>(); |
| } |
| |
| @Override |
| public void addChild(PlanNode child) { |
| // do nothing. this node should never have any child |
| } |
| |
| @Override |
| public PlanNodeType getType() { |
| return PlanNodeType.CREATE_LOGICAL_VIEW; |
| } |
| |
| @Override |
| public PlanNode clone() { |
| // TODO: CRTODO, complete this method |
| throw new NotImplementedException("Clone of CreateMultiTimeSeriesNode is not implemented"); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| CreateLogicalViewNode that = (CreateLogicalViewNode) obj; |
| return (this.getPlanNodeId().equals(that.getPlanNodeId()) |
| && Objects.equals(this.viewPathToSourceMap, that.viewPathToSourceMap)); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(this.getPlanNodeId(), this.viewPathToSourceMap); |
| } |
| |
| @Override |
| public int allowedChildCount() { |
| // this node should never have any child |
| return NO_CHILD_ALLOWED; |
| } |
| |
| @Override |
| public List<String> getOutputColumnNames() { |
| // TODO: CRTODO, complete this method |
| throw new NotImplementedException( |
| "getOutputColumnNames of CreateMultiTimeSeriesNode is not implemented"); |
| } |
| |
| @Override |
| protected void serializeAttributes(ByteBuffer byteBuffer) { |
| PlanNodeType.CREATE_LOGICAL_VIEW.serialize(byteBuffer); |
| // serialize other member variables for this node |
| ReadWriteIOUtils.write(this.viewPathToSourceMap.size(), byteBuffer); |
| for (Map.Entry<PartialPath, ViewExpression> entry : viewPathToSourceMap.entrySet()) { |
| entry.getKey().serialize(byteBuffer); |
| ViewExpression.serialize(entry.getValue(), byteBuffer); |
| } |
| } |
| |
| @Override |
| protected void serializeAttributes(DataOutputStream stream) throws IOException { |
| PlanNodeType.CREATE_LOGICAL_VIEW.serialize(stream); |
| // serialize other member variables for this node |
| ReadWriteIOUtils.write(this.viewPathToSourceMap.size(), stream); |
| for (Map.Entry<PartialPath, ViewExpression> entry : viewPathToSourceMap.entrySet()) { |
| entry.getKey().serialize(stream); |
| ViewExpression.serialize(entry.getValue(), stream); |
| } |
| } |
| |
| public static CreateLogicalViewNode deserialize(ByteBuffer byteBuffer) { |
| // deserialize member variables |
| Map<PartialPath, ViewExpression> viewPathToSourceMap = new HashMap<>(); |
| int size = byteBuffer.getInt(); |
| PartialPath path; |
| ViewExpression viewExpression; |
| for (int i = 0; i < size; i++) { |
| path = (PartialPath) PathDeserializeUtil.deserialize(byteBuffer); |
| viewExpression = ViewExpression.deserialize(byteBuffer); |
| viewPathToSourceMap.put(path, viewExpression); |
| } |
| // deserialize PlanNodeId next |
| PlanNodeId planNodeId = PlanNodeId.deserialize(byteBuffer); |
| return new CreateLogicalViewNode(planNodeId, viewPathToSourceMap); |
| } |
| |
| @Override |
| public List<WritePlanNode> splitByPartition(Analysis analysis) { |
| Map<TRegionReplicaSet, Map<PartialPath, ViewExpression>> splitMap = new HashMap<>(); |
| for (Map.Entry<PartialPath, ViewExpression> entry : this.viewPathToSourceMap.entrySet()) { |
| // for each entry in the map for target path to source expression, |
| // build a map from TRegionReplicaSet to this entry. |
| // Please note that getSchemaRegionReplicaSet needs a device path as parameter. |
| TRegionReplicaSet regionReplicaSet = |
| analysis.getSchemaPartitionInfo().getSchemaRegionReplicaSet(entry.getKey().getDevice()); |
| |
| // create a map if the key(regionReplicaSet) is not exists, |
| // then put this entry into this map(from regionReplicaSet to this entry) |
| splitMap |
| .computeIfAbsent(regionReplicaSet, k -> new HashMap<>()) |
| .put(entry.getKey(), entry.getValue()); |
| } |
| |
| // split this node into several nodes according to their regionReplicaSet |
| List<WritePlanNode> result = new ArrayList<>(); |
| int maxSingleRequestSize = |
| IoTDBDescriptor.getInstance().getConfig().getMaxMeasurementNumOfInternalRequest(); |
| for (Map.Entry<TRegionReplicaSet, Map<PartialPath, ViewExpression>> entry : |
| splitMap.entrySet()) { |
| // for each entry in splitMap, create a plan node. |
| if (entry.getValue().size() > maxSingleRequestSize) { |
| for (Map<PartialPath, ViewExpression> splitRequest : |
| splitRequest(entry.getValue(), maxSingleRequestSize)) { |
| result.add(new CreateLogicalViewNode(getPlanNodeId(), splitRequest, entry.getKey())); |
| } |
| } else { |
| result.add(new CreateLogicalViewNode(getPlanNodeId(), entry.getValue(), entry.getKey())); |
| } |
| } |
| return result; |
| } |
| |
| private List<Map<PartialPath, ViewExpression>> splitRequest( |
| Map<PartialPath, ViewExpression> rawRequest, int maxSize) { |
| int num = 0; |
| List<Map<PartialPath, ViewExpression>> result = |
| new ArrayList<>(rawRequest.size() / maxSize + 1); |
| Map<PartialPath, ViewExpression> map = new HashMap<>(); |
| for (Map.Entry<PartialPath, ViewExpression> entry : rawRequest.entrySet()) { |
| if (num == maxSize) { |
| result.add(map); |
| num = 0; |
| map = new HashMap<>(); |
| } |
| map.put(entry.getKey(), entry.getValue()); |
| num++; |
| } |
| if (num > 0) { |
| result.add(map); |
| } |
| return result; |
| } |
| |
| // endregion |
| |
| public List<PartialPath> getAllTimeSeriesPathInSource() { |
| List<ViewExpression> sourceExpressions = new ArrayList<>(); |
| for (Map.Entry<PartialPath, ViewExpression> entry : this.viewPathToSourceMap.entrySet()) { |
| sourceExpressions.add(entry.getValue()); |
| } |
| // for each view expression, get the partial path for time series operand |
| List<PartialPath> result = new ArrayList<>(); |
| GetSourcePathsVisitor getSourcePathsVisitor = new GetSourcePathsVisitor(); |
| for (ViewExpression expression : sourceExpressions) { |
| result.addAll(getSourcePathsVisitor.process(expression, null)); |
| } |
| return result; |
| } |
| } |