org.apache.hadoop.hive.ql.udf.UDFToBoolean 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,
* 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.common.type.HiveDecimal;
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.CastDecimalToBoolean;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.CastDoubleToBooleanViaDoubleToLong;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.CastLongToBooleanViaLongToLong;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.CastDateToBooleanViaLongToLong;
import org.apache.hadoop.hive.ql.exec.vector.expressions.gen.CastTimestampToBooleanViaLongToLong;
import org.apache.hadoop.hive.serde2.io.ByteWritable;
import org.apache.hadoop.hive.serde2.io.DateWritable;
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.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;
/**
* UDFToBoolean.
*
*/
@VectorizedExpressions({CastLongToBooleanViaLongToLong.class,
CastDateToBooleanViaLongToLong.class, CastTimestampToBooleanViaLongToLong.class,
CastDoubleToBooleanViaDoubleToLong.class, CastDecimalToBoolean.class})
public class UDFToBoolean extends UDF {
private final BooleanWritable booleanWritable = new BooleanWritable();
public UDFToBoolean() {
}
/**
* Convert a void to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The value of a void type
* @return BooleanWritable
*/
public BooleanWritable evaluate(NullWritable i) {
return null;
}
/**
* Convert from a byte to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The byte value to convert
* @return BooleanWritable
*/
public BooleanWritable evaluate(ByteWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.get() != 0);
return booleanWritable;
}
}
/**
* Convert from a short to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The short value to convert
* @return BooleanWritable
*/
public BooleanWritable evaluate(ShortWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.get() != 0);
return booleanWritable;
}
}
/**
* Convert from a integer to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The integer value to convert
* @return BooleanWritable
*/
public BooleanWritable evaluate(IntWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.get() != 0);
return booleanWritable;
}
}
/**
* Convert from a long to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The long value to convert
* @return BooleanWritable
*/
public BooleanWritable evaluate(LongWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.get() != 0);
return booleanWritable;
}
}
/**
* Convert from a float to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The float value to convert
* @return BooleanWritable
*/
public BooleanWritable evaluate(FloatWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.get() != 0);
return booleanWritable;
}
}
/**
* Convert from a double to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The double value to convert
* @return BooleanWritable
*/
public BooleanWritable evaluate(DoubleWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.get() != 0);
return booleanWritable;
}
}
/**
* Convert from a string to boolean. This is called for CAST(... AS BOOLEAN)
*
* @param i
* The string value to convert
* @return BooleanWritable
*/
public BooleanWritable evaluate(Text i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.getLength() != 0);
return booleanWritable;
}
}
public BooleanWritable evaluate(DateWritable d) {
// date value to boolean doesn't make any sense.
return null;
}
public BooleanWritable evaluate(TimestampWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(i.getSeconds() != 0 || i.getNanos() != 0);
return booleanWritable;
}
}
public BooleanWritable evaluate(HiveDecimalWritable i) {
if (i == null) {
return null;
} else {
booleanWritable.set(HiveDecimal.ZERO.compareTo(i.getHiveDecimal()) != 0);
return booleanWritable;
}
}
}