io.trino.sql.planner.optimizations.AdaptivePlanOptimizer 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.sql.planner.optimizations;
import io.trino.sql.planner.plan.PlanNode;
import io.trino.sql.planner.plan.PlanNodeId;
import java.util.Set;
import static java.util.Objects.requireNonNull;
/**
* This optimizer is needed for adaptive optimization in FTE.
*/
public interface AdaptivePlanOptimizer
extends PlanOptimizer
{
@Override
default PlanNode optimize(PlanNode plan, Context context)
{
return optimizeAndMarkPlanChanges(plan, context).plan();
}
/**
* Optimize the plan and return the changes made to the plan.
*/
Result optimizeAndMarkPlanChanges(PlanNode plan, Context context);
record Result(PlanNode plan, Set changedPlanNodes)
{
/**
* @param plan The optimized plan
* @param changedPlanNodes The set of PlanNodeIds that were changed during optimization, as well as the new
* PlanNodeIds that were added to the optimized plan.
*/
public Result(PlanNode plan, Set changedPlanNodes)
{
this.plan = requireNonNull(plan, "plan is null");
this.changedPlanNodes = requireNonNull(changedPlanNodes, "changedPlanNodes is null");
}
}
}