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/*
* 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.drill.exec.planner.cost;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;
/**
* Cost estimates per physical relation. These cost estimations are computed
* during physical planning by the optimizer. These are also used post physical
* planning to compute memory requirements in minor fragment generation phase.
*
*/
@JsonTypeName("cost-estimates")
public class PrelCostEstimates {
// memory requirement for an operator.
private final double memoryCost;
// number of rows that are output by this operator.
private final double outputRowCount;
public static PrelCostEstimates ZERO_COST = new PrelCostEstimates(0,0);
public PrelCostEstimates(@JsonProperty("memoryCost") double memory,
@JsonProperty("outputRowCount") double rowCount) {
this.memoryCost = memory;
this.outputRowCount = rowCount;
}
public double getOutputRowCount() {
return outputRowCount;
}
public double getMemoryCost() {
return memoryCost;
}
}
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