Apache Pig - ToDate()
This function is used to generate a DateTime object according to the given parameters.
Syntax
The syntax of ToDate() function can be any of the following −
grunt> ToDate(milliseconds) grunt> ToDate(iosstring) grunt> ToDate(userstring, format) grunt> ToDate(userstring, format, timezone)
Example
Assume that there is a file named date.txt in the HDFS directory /pig_data/. This file contains the date-of-birth details of a particular person, id, date, and time.
date.txt
001,1989/09/26 09:00:00 002,1980/06/20 10:22:00 003,1990/12/19 03:11:44
And, we have loaded this file into Pig with a relation named date_data as shown below.
grunt> date_data = LOAD 'hdfs://localhost:9000/pig_data/date.txt' USING PigStorage(',') as (id:int,date:chararray);
Following is an example of the ToDate() function. Here we are converting the DateTime object corresponding to the date-of-birth of every employee.
grunt> todate_data = foreach date_data generate ToDate(date,'yyyy/MM/dd HH:mm:ss') as (date_time:DateTime >);
The result (DateTime object of every employee) of the statement will be stored in the relation named todate_data. Verify the content of this relation using the Dump operator as shown below.
grunt> Dump todate_data; (1989-09-26T09:00:00.000+05:30) (1980-06-20T10:22:00.000+05:30) (1990-12-19T03:11:44.000+05:30)