org.apache.hadoop.hive.ql.optimizer.calcite.translator.PlanModifierForReturnPath Maven / Gradle / Ivy

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/**
 * 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.translator;

import java.util.List;

import org.apache.calcite.rel.RelNode;
import org.apache.calcite.util.Pair;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.ql.optimizer.calcite.CalciteSemanticException;
import org.apache.hadoop.hive.ql.optimizer.calcite.HiveCalciteUtil;

public class PlanModifierForReturnPath {


  public static RelNode convertOpTree(RelNode rel, List resultSchema)
          throws CalciteSemanticException {
    RelNode newTopNode = rel;

    Pair topSelparentPair = HiveCalciteUtil.getTopLevelSelect(newTopNode);
    PlanModifierUtil.fixTopOBSchema(newTopNode, topSelparentPair, resultSchema, false);

    return newTopNode;
  }

}