/**
* 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.physical;
import java.io.IOException;
import java.util.List;
import org.apache.drill.common.expression.FieldReference;
import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.common.logical.data.NamedExpression;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.config.Project;
import org.apache.drill.exec.planner.logical.DrillOptiq;
import org.apache.drill.exec.planner.logical.DrillParseContext;
import org.apache.drill.exec.planner.physical.ProjectPrel;
import org.eigenbase.rel.RelNode;
import org.eigenbase.relopt.RelOptCluster;
import org.eigenbase.relopt.RelTraitSet;
import org.eigenbase.reltype.RelDataType;
import org.eigenbase.rex.RexNode;
import org.eigenbase.util.Pair;
import com.google.common.collect.Lists;
public class ProjectAllowDupPrel extends ProjectPrel {
public ProjectAllowDupPrel(RelOptCluster cluster, RelTraitSet traits, RelNode child, List<RexNode> exps,
RelDataType rowType) {
super(cluster, traits, child, exps, rowType);
}
@Override
public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) throws IOException {
Prel child = (Prel) this.getChild();
PhysicalOperator childPOP = child.getPhysicalOperator(creator);
Project p = new Project(this.getProjectExpressions(new DrillParseContext()), childPOP);
return creator.addMetadata(this, p);
}
protected List<NamedExpression> getProjectExpressions(DrillParseContext context) {
List<NamedExpression> expressions = Lists.newArrayList();
for (Pair<RexNode, String> pair : Pair.zip(exps, getRowType().getFieldNames())) {
LogicalExpression expr = DrillOptiq.toDrill(context, getChild(), pair.left);
expressions.add(new NamedExpression(expr, FieldReference.getWithQuotedRef(pair.right)));
}
return expressions;
}
}