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

java.lang.Object
  org.apache.hadoop.hive.ql.udf.generic.GenericUDF
      org.apache.hadoop.hive.ql.udf.generic.GenericUDFBaseCompare

All Implemented Interfaces:

Closeable

Direct Known Subclasses:

GenericUDFOPEqual, GenericUDFOPEqualOrGreaterThan, GenericUDFOPEqualOrLessThan, GenericUDFOPGreaterThan, GenericUDFOPLessThan, GenericUDFOPNotEqual

public abstract class GenericUDFBaseCompare
extends GenericUDF

GenericUDF Base Class for operations.

Nested Class Summary

static class

GenericUDFBaseCompare.CompareType

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

GenericUDF.DeferredJavaObject, GenericUDF.DeferredObject

Constructor Summary

GenericUDFBaseCompare()

Method Summary

Integer	compare(GenericUDF.DeferredObject[] arguments)
String	getDisplayString(String[] children) Get the String to be displayed in explain.
ObjectInspector	initialize(ObjectInspector[] arguments) Initialize this GenericUDF.

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

close, configure, copyToNewInstance, evaluate, flip, getRequiredFiles, getRequiredJars, getUdfName, initializeAndFoldConstants

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericUDFBaseCompare

public GenericUDFBaseCompare()

Method Detail

initialize

public ObjectInspector initialize(ObjectInspector[] arguments)
                           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:

arguments - The ObjectInspector for the arguments

Returns:

The ObjectInspector for the return value

Throws:

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

compare

public Integer compare(GenericUDF.DeferredObject[] arguments)
                throws HiveException

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