/**
* 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.logical;
import org.eigenbase.rel.ValuesRel;
import org.eigenbase.relopt.Convention;
import org.eigenbase.relopt.RelOptRule;
import org.eigenbase.relopt.RelOptRuleCall;
import org.eigenbase.relopt.RelTraitSet;
/**
* Rule that converts a {@link ValuesRel} to a Drill "values" operation.
*/
public class DrillValuesRule extends RelOptRule {
public static final RelOptRule INSTANCE = new DrillValuesRule();
private DrillValuesRule() {
super(RelOptHelper.any(ValuesRel.class, Convention.NONE), "DrillValuesRule");
}
@Override
public void onMatch(RelOptRuleCall call) {
final ValuesRel values = (ValuesRel) call.rel(0);
final RelTraitSet traits = values.getTraitSet().plus(DrillRel.DRILL_LOGICAL);
call.transformTo(new DrillValuesRel(values.getCluster(), values.getRowType(), values.getTuples(), traits));
}
}