/**
* 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.hadoop.hive.ql.optimizer.calcite;
import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.rel.RelCollation;
import org.apache.calcite.rel.RelCollations;
import org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveRelNode;
public class TraitsUtil {
public static RelTraitSet getSortTraitSet(RelOptCluster cluster, RelTraitSet traitSet,
RelCollation collation) {
return traitSet.plus(collation);
}
public static RelTraitSet getDefaultTraitSet(RelOptCluster cluster) {
return cluster.traitSetOf(HiveRelNode.CONVENTION, RelCollations.EMPTY);
}
public static RelTraitSet getDefaultTraitSet(RelOptCluster cluster, RelTraitSet traitsFromInput) {
return RelTraitSet.createEmpty().merge(traitsFromInput).merge(getDefaultTraitSet(cluster));
}
}