content: /*
   * 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 com.aliyun.odps.sqa.commandapi;
  
  import java.util.List;
  
  import com.aliyun.odps.Odps;
  import com.aliyun.odps.OdpsException;
  import com.aliyun.odps.sqa.commandapi.CommandInfo;
  import com.aliyun.odps.type.TypeInfo;
  
  
  public interface Command {
  
    boolean isSync();
  
    /**
     * 结果集的列名。和列类型一一对应。
     *
     * @return
     */
    List<String> getResultHeaders();
  
    /**
     * 结果集的列类型。和列名一一对应。
     *
     * @return
     */
    List<TypeInfo> getResultTypes();
  
    RecordIter run(Odps odps, CommandInfo commandInfo) throws OdpsException;
  
  }
  