/tags/release-0.2.0-rc0/hive/external/contrib/src/java/org/apache/hadoop/hive/contrib/udf/UDFRowSequence.java
Java | 46 lines | 19 code | 6 blank | 21 comment | 0 complexity | 93107655a633280ab66eadfe894a0b4e 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.contrib.udf;
- import org.apache.hadoop.hive.ql.exec.Description;
- import org.apache.hadoop.hive.ql.exec.UDF;
- import org.apache.hadoop.hive.ql.udf.UDFType;
- import org.apache.hadoop.io.LongWritable;
- /**
- * UDFRowSequence.
- */
- @Description(name = "row_sequence",
- value = "_FUNC_() - Returns a generated row sequence number starting from 1")
- @UDFType(deterministic = false, stateful = true)
- public class UDFRowSequence extends UDF
- {
- private LongWritable result = new LongWritable();
- public UDFRowSequence() {
- result.set(0);
- }
- public LongWritable evaluate() {
- result.set(result.get() + 1);
- return result;
- }
- }
- // End UDFRowSequence.java