org.apache.hadoop.hive.contrib.udtf.example

Class GenericUDTFCount2

java.lang.Object

org.apache.hadoop.hive.ql.udf.generic.GenericUDTF

org.apache.hadoop.hive.contrib.udtf.example.GenericUDTFCount2

public class GenericUDTFCount2
extends GenericUDTF

GenericUDTFCount2 outputs the number of rows seen, twice. It's output twice to test outputting of rows on close with lateral view.

Constructor Summary

Constructors

Constructor and Description
GenericUDTFCount2()

Method Summary

Modifier and Type	Method and Description
void	close() Called to notify the UDTF that there are no more rows to process.
StructObjectInspector	initialize(ObjectInspector[] argOIs) Initialize this GenericUDTF.
void	process(Object[] args) Give a set of arguments for the UDTF to process.

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDTF

configure, forward, initialize, setCollector

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericUDTFCount2

public GenericUDTFCount2()

Method Detail

close

public void close()
           throws HiveException

Description copied from class: GenericUDTF

Called to notify the UDTF that there are no more rows to process. Clean up code or additional forward() calls can be made here.

Specified by:

close in class GenericUDTF

Throws:

HiveException

initialize

public StructObjectInspector initialize(ObjectInspector[] argOIs)
                                 throws UDFArgumentException

Description copied from class: GenericUDTF

Initialize this GenericUDTF. This will be called only once per instance.

Overrides:

initialize in class GenericUDTF

Parameters:

argOIs - An array of ObjectInspectors for the arguments

Returns:

A StructObjectInspector for output. The output struct represents a row of the table where the fields of the stuct are the columns. The field names are unimportant as they will be overridden by user supplied column aliases.

Throws:

UDFArgumentException

process

public void process(Object[] args)
             throws HiveException

Description copied from class: GenericUDTF

Give a set of arguments for the UDTF to process.

Specified by:

process in class GenericUDTF

Parameters:

args - object array of arguments

Throws:

HiveException