/**
* 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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
@Description (
name="E",
value="_FUNC_() - returns E ",
extended = "Example:\n"+
" > SELECT _FUNC_() FROM src LIMIT 1;\n" +
" 2.718281828459045"
)
public class UDFE extends UDF {
@SuppressWarnings("unused")
private static final Logger LOG = LoggerFactory.getLogger(UDFE.class.getName() );
DoubleWritable result = new DoubleWritable();
public UDFE() {
super();
result.set(Math.E);
}
public DoubleWritable evaluate() {
return result;
}
}