org.apache.hadoop.hive.ql.exec.vector.expressions.CastLongToString Maven / Gradle / Ivy
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* 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,
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* 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;
public class CastLongToString extends LongToStringUnaryUDF {
private static final long serialVersionUID = 1L;
protected transient byte[] temp; // temporary location for building number string
public CastLongToString() {
super();
temp = new byte[20];
}
public CastLongToString(int inputColumn, int outputColumn) {
super(inputColumn, outputColumn);
temp = new byte[20];
}
// 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, long[] vector, int i) {
int len = MathExpr.writeLongToUTF8(temp, vector[i]);
assign(outV, i, temp, len);
}
}