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

java.lang.Object
  extended by org.apache.hadoop.hive.ql.udf.generic.GenericUDF
      extended by org.apache.hadoop.hive.ql.udf.generic.GenericUDFToUnixTimeStamp
All Implemented Interfaces:
Closeable
Direct Known Subclasses:
GenericUDFUnixTimeStamp

public class GenericUDFToUnixTimeStamp
extends GenericUDF

deterministic version of UDFUnixTimeStamp. enforces argument


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF
GenericUDF.DeferredJavaObject, GenericUDF.DeferredObject
 
Field Summary
protected  LongWritable retValue
           
 
Constructor Summary
GenericUDFToUnixTimeStamp()
           
 
Method Summary
 Object evaluate(GenericUDF.DeferredObject[] arguments)
          Evaluate the GenericUDF with the arguments.
 String getDisplayString(String[] children)
          Get the String to be displayed in explain.
protected  String getName()
           
 ObjectInspector initialize(ObjectInspector[] arguments)
          Initialize this GenericUDF.
protected  void initializeInput(ObjectInspector[] arguments)
           
 
Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF
close, configure, getRequiredFiles, getRequiredJars, initializeAndFoldConstants
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

retValue

protected final transient LongWritable retValue
Constructor Detail

GenericUDFToUnixTimeStamp

public GenericUDFToUnixTimeStamp()
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.

initializeInput

protected void initializeInput(ObjectInspector[] arguments)
                        throws UDFArgumentException
Throws:
UDFArgumentException

getName

protected String getName()

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


Copyright © 2012 The Apache Software Foundation