org.apache.hadoop.hive.ql.udf.UDFToInteger 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;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedExpressions;
import org.apache.hadoop.hive.ql.exec.vector.expressions.CastDecimalToLong;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.CastDoubleToLong;
import org.apache.hadoop.hive.ql.exec.vector.expressions.CastTimestampToLong;
import org.apache.hadoop.hive.ql.io.RecordIdentifier;
import org.apache.hadoop.hive.serde2.io.ByteWritable;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
import org.apache.hadoop.hive.serde2.io.HiveDecimalWritable;
import org.apache.hadoop.hive.serde2.io.ShortWritable;
import org.apache.hadoop.hive.serde2.io.TimestampWritable;
import org.apache.hadoop.hive.serde2.lazy.LazyInteger;
import org.apache.hadoop.hive.serde2.lazy.LazyUtils;
import org.apache.hadoop.io.BooleanWritable;
import org.apache.hadoop.io.FloatWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
/**
* UDFToInteger.
*
*/
@VectorizedExpressions({CastTimestampToLong.class, CastDoubleToLong.class,
CastDecimalToLong.class})
public class UDFToInteger extends UDF {
private final IntWritable intWritable = new IntWritable();
public UDFToInteger() {
}
/**
* Convert from void to an integer. This is called for CAST(... AS INT)
*
* @param i
* The void value to convert
* @return Integer
*/
public IntWritable evaluate(NullWritable i) {
return null;
}
/**
* Convert from boolean to an integer. This is called for CAST(... AS INT)
*
* @param i
* The boolean value to convert
* @return IntWritable
*/
public IntWritable evaluate(BooleanWritable i) {
if (i == null) {
return null;
} else {
intWritable.set(i.get() ? 1 : 0);
return intWritable;
}
}
/**
* Convert from byte to an integer. This is called for CAST(... AS INT)
*
* @param i
* The byte value to convert
* @return IntWritable
*/
public IntWritable evaluate(ByteWritable i) {
if (i == null) {
return null;
} else {
intWritable.set(i.get());
return intWritable;
}
}
/**
* Convert from short to an integer. This is called for CAST(... AS INT)
*
* @param i
* The short value to convert
* @return IntWritable
*/
public IntWritable evaluate(ShortWritable i) {
if (i == null) {
return null;
} else {
intWritable.set(i.get());
return intWritable;
}
}
/**
* Convert from long to an integer. This is called for CAST(... AS INT)
*
* @param i
* The long value to convert
* @return IntWritable
*/
public IntWritable evaluate(LongWritable i) {
if (i == null) {
return null;
} else {
intWritable.set((int) i.get());
return intWritable;
}
}
/**
* Convert from float to an integer. This is called for CAST(... AS INT)
*
* @param i
* The float value to convert
* @return IntWritable
*/
public IntWritable evaluate(FloatWritable i) {
if (i == null) {
return null;
} else {
intWritable.set((int) i.get());
return intWritable;
}
}
/**
* Convert from double to an integer. This is called for CAST(... AS INT)
*
* @param i
* The double value to convert
* @return IntWritable
*/
public IntWritable evaluate(DoubleWritable i) {
if (i == null) {
return null;
} else {
intWritable.set((int) i.get());
return intWritable;
}
}
/**
* Convert from string to an integer. This is called for CAST(... AS INT)
*
* @param i
* The string value to convert
* @return IntWritable
*/
public IntWritable evaluate(Text i) {
if (i == null) {
return null;
} else {
if (!LazyUtils.isNumberMaybe(i.getBytes(), 0, i.getLength())) {
return null;
}
try {
intWritable.set(LazyInteger
.parseInt(i.getBytes(), 0, i.getLength(), 10));
return intWritable;
} catch (NumberFormatException e) {
// MySQL returns 0 if the string is not a well-formed numeric value.
// return IntWritable.valueOf(0);
// But we decided to return NULL instead, which is more conservative.
return null;
}
}
}
/**
* Convert from Timestamp to an integer. This is called for CAST(... AS INT)
*
* @param i
* The Timestamp value to convert
* @return IntWritable
*/
public IntWritable evaluate(TimestampWritable i) {
if (i == null) {
return null;
} else {
intWritable.set((int) i.getSeconds());
return intWritable;
}
}
public IntWritable evaluate(HiveDecimalWritable i) {
if (i == null || !i.isSet() || !i.isInt()) {
return null;
} else {
intWritable.set(i.intValue());
return intWritable;
}
}
/**
* Convert a RecordIdentifier. This is done so that we can use the RecordIdentifier in place
* of the bucketing column.
* @param i RecordIdentifier to convert
* @return value of the bucket identifier
*/
public IntWritable evaluate(RecordIdentifier i) {
if (i == null) {
return null;
} else {
intWritable.set(i.getBucketId());
return intWritable;
}
}
}