org.apache.hadoop.hive.ql.exec.vector.expressions.CastDecimalToTimestamp 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.exec.vector.expressions;
import org.apache.hadoop.hive.common.type.HiveDecimal;
import org.apache.hadoop.hive.ql.exec.vector.DecimalColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector;
/**
* Type cast decimal to timestamp. The decimal value is interpreted
* as NNNN.DDDDDDDDD where NNNN is a number of seconds and DDDDDDDDD
* is a number of nano-seconds.
*/
public class CastDecimalToTimestamp extends FuncDecimalToLong {
private static final long serialVersionUID = 1L;
private static transient HiveDecimal tenE9 = HiveDecimal.create(1000000000);
public CastDecimalToTimestamp(int inputColumn, int outputColumn) {
super(inputColumn, outputColumn);
}
public CastDecimalToTimestamp() {
}
@Override
protected void func(LongColumnVector outV, DecimalColumnVector inV, int i) {
HiveDecimal result = inV.vector[i].getHiveDecimal().multiply(tenE9);
if (result == null) {
outV.noNulls = false;
outV.isNull[i] = true;
} else {
outV.vector[i] = result.longValue();
}
}
}