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

Class GenericUDFExceptionInVertex

java.lang.Object

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

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

All Implemented Interfaces:

Closeable, AutoCloseable

public class GenericUDFExceptionInVertex
extends GenericUDF

This class implements the UDF which can throw an exception in arbitrary vertex (typically mapper) / task / task attempt. For throwing exception in reducer side, where most probably GroupByOperator codepath applies, GenericUDAFExceptionInVertex is used.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

GenericUDF.DeferredJavaObject, GenericUDF.DeferredObject

Constructor Summary

Constructors

Constructor and Description
GenericUDFExceptionInVertex()

Method Summary

Modifier and Type	Method and Description
void	configure(MapredContext mapredContext) Additionally setup GenericUDF with MapredContext before initializing.
Object	evaluate(GenericUDF.DeferredObject[] arguments) Evaluate the GenericUDF with the arguments.
String	getDisplayString(String[] children) Get the String to be displayed in explain.
static String	getTaskAttemptNumber(ObjectInspector[] parameters, int index)
static String	getTaskNumber(ObjectInspector[] parameters, int index)
static String	getVertexName(ObjectInspector[] parameters, int index)
ObjectInspector	initialize(ObjectInspector[] parameters) Initialize this GenericUDF.
static boolean	numberFitsExpression(int number, String expression)

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

adapt, checkArgGroups, checkArgPrimitive, checkArgsSize, close, copyToNewInstance, flip, getArgOrder, getConstantBooleanValue, getConstantIntValue, getConstantStringValue, getDateValue, getDoubleValue, getFuncName, getIntervalDayTimeValue, getIntervalYearMonthValue, getIntValue, getLongValue, getRequiredFiles, getRequiredJars, getStandardDisplayString, getStandardDisplayString, getStringValue, getTimestampValue, getUdfName, initializeAndFoldConstants, negative, obtainDateConverter, obtainDoubleConverter, obtainIntConverter, obtainLongConverter, obtainStringConverter, obtainTimestampConverter

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericUDFExceptionInVertex

public GenericUDFExceptionInVertex()

Method Detail

initialize

public ObjectInspector initialize(ObjectInspector[] parameters)
                           throws UDFArgumentException

Description copied from class: GenericUDF

Initialize this GenericUDF. This will be called once and only once per GenericUDF instance.

Specified by:

initialize in class GenericUDF

Parameters:

parameters - The ObjectInspector for the arguments

Returns:

The ObjectInspector for the return value

Throws:

UDFArgumentException - Thrown when arguments have wrong types, wrong length, etc.

getVertexName

public static String getVertexName(ObjectInspector[] parameters,
                                   int index)
                            throws UDFArgumentTypeException

Throws:

UDFArgumentTypeException

getTaskNumber

public static String getTaskNumber(ObjectInspector[] parameters,
                                   int index)
                            throws UDFArgumentTypeException

Throws:

UDFArgumentTypeException

getTaskAttemptNumber

public static String getTaskAttemptNumber(ObjectInspector[] parameters,
                                          int index)
                                   throws UDFArgumentTypeException

Throws:

UDFArgumentTypeException

numberFitsExpression

public static boolean numberFitsExpression(int number,
                                           String expression)

configure

public void configure(MapredContext mapredContext)

Description copied from class: GenericUDF

Additionally setup GenericUDF with MapredContext before initializing. This is only called in runtime of MapRedTask.

Overrides:

configure in class GenericUDF

Parameters:

mapredContext - context

evaluate

public Object evaluate(GenericUDF.DeferredObject[] arguments)
                throws HiveException

Description copied from class: GenericUDF

Evaluate the GenericUDF with the arguments.

Specified by:

evaluate in class GenericUDF

Parameters:

arguments - The arguments as DeferedObject, use DeferedObject.get() to get the actual argument Object. The Objects can be inspected by the ObjectInspectors passed in the initialize call.

Returns:

The

Throws:

HiveException

getDisplayString

public String getDisplayString(String[] children)

Description copied from class: GenericUDF

Get the String to be displayed in explain.

Specified by:

getDisplayString in class GenericUDF