io.trino.cost.CostCalculator Maven / Gradle / Ivy
/*
* Licensed 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 io.trino.cost;
import com.google.errorprone.annotations.ThreadSafe;
import com.google.inject.BindingAnnotation;
import io.trino.Session;
import io.trino.sql.planner.TypeProvider;
import io.trino.sql.planner.plan.PlanNode;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
@ThreadSafe
public interface CostCalculator
{
/**
* Calculates cumulative cost of a node.
*
* @param node The node to compute cost for.
* @param stats The stats provider for node's stats and child nodes' stats, to be used if stats are needed to compute cost for the {@code node}
*/
PlanCostEstimate calculateCost(
PlanNode node,
StatsProvider stats,
CostProvider sourcesCosts,
Session session,
TypeProvider types);
@BindingAnnotation
@Target(PARAMETER)
@Retention(RUNTIME)
@interface EstimatedExchanges {}
}