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/tags/release-0.0.0-rc0/hive/external/ql/src/java/org/apache/hadoop/hive/ql/udf/UDFUpper.java

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Java | 48 lines | 20 code | 7 blank | 21 comment | 2 complexity | e1925a9ad14f760fdfb5e21af6997342 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
19package org.apache.hadoop.hive.ql.udf;
20
21import org.apache.hadoop.hive.ql.exec.Description;
22import org.apache.hadoop.hive.ql.exec.UDF;
23import org.apache.hadoop.io.Text;
24
25/**
26 * UDFUpper.
27 *
28 */
29@Description(name = "upper,ucase",
30    value = "_FUNC_(str) - Returns str with all characters changed to uppercase",
31    extended = "Example:\n"
32    + "  > SELECT _FUNC_('Facebook') FROM src LIMIT 1;\n" + "  'FACEBOOK'")
33public class UDFUpper extends UDF {
34
35  Text t = new Text();
36
37  public UDFUpper() {
38  }
39
40  public Text evaluate(Text s) {
41    if (s == null) {
42      return null;
43    }
44    t.set(s.toString().toUpperCase());
45    return t;
46  }
47
48}