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/tags/release-0.2.0-rc0/hive/external/contrib/src/java/org/apache/hadoop/hive/contrib/udaf/example/UDAFExampleMaxN.java

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Java | 41 lines | 10 code | 8 blank | 23 comment | 0 complexity | 391e66373a9e804501b3f90d1fc81fcf MD5 | raw file
 1/**
 2 * Licensed to the Apache Software Foundation (ASF) under one
 3 * or more contributor license agreements.  See the NOTICE file
 4 * distributed with this work for additional information
 5 * regarding copyright ownership.  The ASF licenses this file
 6 * to you under the Apache License, Version 2.0 (the
 7 * "License"); you may not use this file except in compliance
 8 * with the License.  You may obtain a copy of the License at
 9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19
20package org.apache.hadoop.hive.contrib.udaf.example;
21
22import org.apache.hadoop.hive.ql.exec.UDAF;
23
24/**
25 * Returns the max N double values.
26 */
27public class UDAFExampleMaxN extends UDAF {
28
29  /**
30   * The evaluator for getting max N double values.
31   */
32  public static class UDAFMaxNEvaluator extends UDAFExampleMaxMinNUtil.Evaluator {
33
34    @Override
35    protected boolean getAscending() {
36      return false;
37    }
38  }
39  
40}
41