Created
May 13, 2017 20:24
-
-
Save milindjagre/2b6fde437b5cb283113fdc1f9f1a1d17 to your computer and use it in GitHub Desktop.
this pig script is used for performing the join operation between customers and orders data
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
--JOIN OPERATION IN APACHE PIG | |
--loading customers' data in customers relation | |
customers = LOAD '/hdpcd/input/post22/post22_customers.csv' USING PigStorage(','); | |
--loading orders' data in orders relation | |
orders = LOAD '/hdpcd/input/post22/post22_orders.csv' USING PigStorage(','); | |
--performing join operation based on customer ID | |
--customer ID is the first column in customers relation, therefore $0 | |
--customer ID is the third column in orders relation, therefore $2 | |
joined_data = JOIN customers BY $0, orders BY $2; | |
--generating output data with FOREACH...GENERATE command | |
--output contains customers' first name, last name, order ID, and payment status of the order | |
output_data = FOREACH joined_data GENERATE $1 AS fname, $2 AS lname, $8 AS orderid,$12 AS payment_status; | |
--storing the final output in HDFS | |
STORE output_data INTO '/hdpcd/output/post22/'; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment