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

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

public class UDFHour
extends UDF

UDFHour.

Constructor Summary

UDFHour()

Method Summary

org.apache.hadoop.io.IntWritable	evaluate(org.apache.hadoop.io.Text dateString) Get the hour from a date string.
org.apache.hadoop.io.IntWritable	evaluate(TimestampWritable t)

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

UDFHour

public UDFHour()

Method Detail

evaluate

public org.apache.hadoop.io.IntWritable evaluate(org.apache.hadoop.io.Text dateString)

Get the hour from a date string.

Parameters:

dateString - the dateString in the format of "yyyy-MM-dd HH:mm:ss" or "yyyy-MM-dd".

Returns:

an int from 0 to 23. null if the dateString is not a valid date string.

evaluate

public org.apache.hadoop.io.IntWritable evaluate(TimestampWritable t)