org.apache.hadoop.hive.ql.exec.vector.expressions.CastDecimalToString 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.ql.exec.vector.BytesColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.DecimalColumnVector;
/**
* To support vectorized cast of decimal to string.
*/
public class CastDecimalToString extends DecimalToStringUnaryUDF {
private static final long serialVersionUID = 1L;
public CastDecimalToString() {
super();
}
public CastDecimalToString(int inputColumn, int outputColumn) {
super(inputColumn, outputColumn);
}
// The assign method will be overridden for CHAR and VARCHAR.
protected void assign(BytesColumnVector outV, int i, byte[] bytes, int length) {
outV.setVal(i, bytes, 0, length);
}
@Override
protected void func(BytesColumnVector outV, DecimalColumnVector inV, int i) {
String s = inV.vector[i].getHiveDecimal().toString();
byte[] b = null;
try {
b = s.getBytes("UTF-8");
} catch (Exception e) {
// This should never happen. If it does, there is a bug.
throw new RuntimeException("Internal error: unable to convert decimal to string", e);
}
assign(outV, i, b, b.length);
}
}