com.hazelcast.sql.impl.calcite.opt.physical.ProjectPhysicalRel Maven / Gradle / Ivy

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/*
 * Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
 *
 * 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 com.hazelcast.sql.impl.calcite.opt.physical;

import com.hazelcast.sql.impl.calcite.opt.AbstractProjectRel;
import com.hazelcast.sql.impl.calcite.opt.physical.visitor.PhysicalRelVisitor;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.core.Project;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.rex.RexNode;

import java.util.List;

/**
 * Physical projection.
 * 
 * Traits:
 * 

 *     Collation: propagated from input if the prefix of sort fields is preserved; destroyed otherwise
 *     Distribution: derived from input if all distribution fields are preserved; destroyed otherwise
 * 
 */
public class ProjectPhysicalRel extends AbstractProjectRel implements PhysicalRel {
    public ProjectPhysicalRel(
        RelOptCluster cluster,
        RelTraitSet traits,
        RelNode input,
        List projects,
        RelDataType rowType
    ) {
        super(cluster, traits, input, projects, rowType);
    }

    @Override
    public final Project copy(RelTraitSet traitSet, RelNode input, List projects, RelDataType rowType) {
        return new ProjectPhysicalRel(getCluster(), traitSet, input, projects, rowType);
    }

    @Override
    public void visit(PhysicalRelVisitor visitor) {
        ((PhysicalRel) input).visit(visitor);

        visitor.onProject(this);
    }
}