io.trino.sql.planner.iterative.rule.PruneSpatialJoinColumns 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.iterative.rule;
import io.trino.sql.planner.Symbol;
import io.trino.sql.planner.plan.PlanNode;
import io.trino.sql.planner.plan.SpatialJoinNode;
import java.util.Optional;
import java.util.Set;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static io.trino.sql.planner.plan.Patterns.spatialJoin;
/**
* Spatial joins support output symbol selection, so absorb any project-off into the node.
*/
public class PruneSpatialJoinColumns
extends ProjectOffPushDownRule
{
public PruneSpatialJoinColumns()
{
super(spatialJoin());
}
@Override
protected Optional pushDownProjectOff(Context context, SpatialJoinNode spatialJoinNode, Set referencedOutputs)
{
return Optional.of(new SpatialJoinNode(
spatialJoinNode.getId(),
spatialJoinNode.getType(),
spatialJoinNode.getLeft(),
spatialJoinNode.getRight(),
spatialJoinNode.getOutputSymbols().stream()
.filter(referencedOutputs::contains)
.collect(toImmutableList()),
spatialJoinNode.getFilter(),
spatialJoinNode.getLeftPartitionSymbol(),
spatialJoinNode.getRightPartitionSymbol(),
spatialJoinNode.getKdbTree()));
}
}