/tags/release-0.1-rc2/hive/external/ql/src/java/org/apache/hadoop/hive/ql/udf/UDFLength.java
Java | 53 lines | 27 code | 5 blank | 21 comment | 4 complexity | 621abbae632c96b601d46aa77cb2fcd8 MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * 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.udf;
- import org.apache.hadoop.hive.ql.exec.Description;
- import org.apache.hadoop.hive.ql.exec.UDF;
- import org.apache.hadoop.hive.ql.udf.generic.GenericUDFUtils;
- import org.apache.hadoop.io.IntWritable;
- import org.apache.hadoop.io.Text;
- /**
- * UDFLength.
- *
- */
- @Description(name = "length",
- value = "_FUNC_(str) - Returns the length of str ",
- extended = "Example:\n"
- + " > SELECT _FUNC_('Facebook') FROM src LIMIT 1;\n" + " 8")
- public class UDFLength extends UDF {
- private final IntWritable result = new IntWritable();
- public IntWritable evaluate(Text s) {
- if (s == null) {
- return null;
- }
- byte[] data = s.getBytes();
- int len = 0;
- for (int i = 0; i < s.getLength(); i++) {
- if (GenericUDFUtils.isUtfStartByte(data[i])) {
- len++;
- }
- }
- result.set(len);
- return result;
- }
- }