| /* |
| * 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.storageengine.dataregion.read.reader.common; |
| |
| import org.apache.tsfile.read.TimeValuePair; |
| |
| public class AlignedDescPriorityMergeReader extends DescPriorityMergeReader { |
| |
| /** |
| * In the case of aligned time seres, like d1.s1, d1.s2, d1.s3, we may first only write d1.s2, |
| * d1.s3 (2, 3)and then flush it into one tsfile, and then an unseq record come, it contains only |
| * d1.s1 and d1.s3 -> (10,30). So now we have [null, 2, 3] with low priority and [10, null, 30] |
| * with high priority. we use [null, 2, 3] to fill null value in [10, null, 30], so we get [10, 2, |
| * 30], we won't use 3 to replace 30, because [10, null, 30] has higher priority |
| * |
| * @param v TimeValuePair with high priority needs to be filled |
| * @param c TimeValuePair with low priority is used to fill the v |
| */ |
| @Override |
| protected void fillNullValue(TimeValuePair v, TimeValuePair c) { |
| AlignedPriorityMergeReader.fillNullValueInAligned(v, c); |
| } |
| } |