org.apache.hadoop.hive.ql.udf

Class UDFToDouble

java.lang.Object

org.apache.hadoop.hive.ql.exec.UDF

org.apache.hadoop.hive.ql.udf.UDFToDouble

public class UDFToDouble
extends UDF

UDFToDouble.

Constructor Summary

Constructors

Constructor and Description
UDFToDouble()

Method Summary

Modifier and Type	Method and Description
DoubleWritable	evaluate(BooleanWritable i) Convert from boolean to a double.
DoubleWritable	evaluate(FloatWritable i) Convert from float to a double.
DoubleWritable	evaluate(IntWritable i) Convert from integer to a double.
DoubleWritable	evaluate(LongWritable i) Convert from long to a double.
DoubleWritable	evaluate(NullWritable i) Convert from void to a double.
DoubleWritable	evaluate(Text i) Convert from string to a double.

Methods inherited from class org.apache.hadoop.hive.ql.exec.UDF

getRequiredFiles, getRequiredJars, getResolver, setResolver

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UDFToDouble

public UDFToDouble()

Method Detail

evaluate

public DoubleWritable evaluate(NullWritable i)

Convert from void to a double. This is called for CAST(... AS DOUBLE)

Parameters:

i - The void value to convert

Returns:

DoubleWritable

evaluate

public DoubleWritable evaluate(BooleanWritable i)

Convert from boolean to a double. This is called for CAST(... AS DOUBLE)

Parameters:

i - The boolean value to convert

Returns:

DoubleWritable

evaluate

public DoubleWritable evaluate(IntWritable i)

Convert from integer to a double. This is called for CAST(... AS DOUBLE)

Parameters:

i - The integer value to convert

Returns:

DoubleWritable

evaluate

public DoubleWritable evaluate(LongWritable i)

Convert from long to a double. This is called for CAST(... AS DOUBLE)

Parameters:

i - The long value to convert

Returns:

DoubleWritable

evaluate

public DoubleWritable evaluate(FloatWritable i)

Convert from float to a double. This is called for CAST(... AS DOUBLE)

Parameters:

i - The float value to convert

Returns:

DoubleWritable

evaluate

public DoubleWritable evaluate(Text i)

Convert from string to a double. This is called for CAST(... AS DOUBLE)

Parameters:

i - The string value to convert

Returns:

DoubleWritable