org.apache.hadoop.hive.ql.udf
Class UDFToBoolean

java.lang.Object
  org.apache.hadoop.hive.ql.exec.UDF
      org.apache.hadoop.hive.ql.udf.UDFToBoolean

public class UDFToBoolean
extends UDF

UDFToBoolean.

Constructor Summary

UDFToBoolean()

Method Summary

BooleanWritable	evaluate(BigDecimalWritable i)
BooleanWritable	evaluate(ByteWritable i) Convert from a byte to boolean.
BooleanWritable	evaluate(DoubleWritable i) Convert from a double to boolean.
BooleanWritable	evaluate(FloatWritable i) Convert from a float to boolean.
BooleanWritable	evaluate(IntWritable i) Convert from a integer to boolean.
BooleanWritable	evaluate(LongWritable i) Convert from a long to boolean.
BooleanWritable	evaluate(NullWritable i) Convert a void to boolean.
BooleanWritable	evaluate(ShortWritable i) Convert from a short to boolean.
BooleanWritable	evaluate(Text i) Convert from a string to boolean.
BooleanWritable	evaluate(TimestampWritable i)

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

UDFToBoolean

public UDFToBoolean()

Method Detail

evaluate

public BooleanWritable evaluate(NullWritable i)

Convert a void to boolean. This is called for CAST(... AS BOOLEAN)

Parameters:

i - The value of a void type

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(ByteWritable i)

Convert from a byte to boolean. This is called for CAST(... AS BOOLEAN)

Parameters:

i - The byte value to convert

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(ShortWritable i)

Convert from a short to boolean. This is called for CAST(... AS BOOLEAN)

Parameters:

i - The short value to convert

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(IntWritable i)

Convert from a integer to boolean. This is called for CAST(... AS BOOLEAN)

Parameters:

i - The integer value to convert

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(LongWritable i)

Convert from a long to boolean. This is called for CAST(... AS BOOLEAN)

Parameters:

i - The long value to convert

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(FloatWritable i)

Convert from a float to boolean. This is called for CAST(... AS BOOLEAN)

Parameters:

i - The float value to convert

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(DoubleWritable i)

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

Parameters:

i - The double value to convert

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(Text i)

Convert from a string to boolean. This is called for CAST(... AS BOOLEAN)

Parameters:

i - The string value to convert

Returns:

BooleanWritable

evaluate

public BooleanWritable evaluate(TimestampWritable i)

evaluate

public BooleanWritable evaluate(BigDecimalWritable i)