org.apache.hadoop.hive.ql.udf.generic.GenericUDFUnixTimeStamp Maven / Gradle / Ivy
/**
* 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.generic;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.udf.UDFType;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
@UDFType(deterministic = false)
@Description(name = "unix_timestamp",
value = "_FUNC_([date[, pattern]]) - Returns the UNIX timestamp",
extended = "Converts the current or specified time to number of seconds "
+ "since 1970-01-01.")
public class GenericUDFUnixTimeStamp extends GenericUDFToUnixTimeStamp {
@Override
protected void initializeInput(ObjectInspector[] arguments) throws UDFArgumentException {
if (arguments.length > 0) {
super.initializeInput(arguments);
}
}
@Override
protected String getName() {
return "unix_timestamp";
}
@Override
public Object evaluate(DeferredObject[] arguments) throws HiveException {
if (arguments.length == 0) {
retValue.set(System.currentTimeMillis() / 1000);
return retValue;
}
return super.evaluate(arguments);
}
}