blob: ae579dc4f2fe092d79a44c6e8ce4e4bd8766bd91 [file] [log] [blame]
/*
* 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.mpp.plan.planner;
import org.apache.iotdb.db.mpp.plan.planner.plan.FragmentInstance;
import java.util.List;
/**
* The interface is used to transform one PlanFragment into one or more FragmentInstances which
* could run in parallel
*/
public interface IFragmentParallelPlaner {
/**
* The relation between each PlanFragment is necessary because sometimes we need to change the
* source/sink for each FragmentInstance according to its upstream/downstream
*
* @return All the FragmentInstances which can run in parallel
*/
List<FragmentInstance> parallelPlan();
}