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What is TOTUPLE() function in Apache Pig ?

  • The TOTUPLE() function is used convert one or more expressions to the data type tuple.


grunt> TOTUPLE(expression [, expression ...])


Ensure that we have a file named wikitechy_emp_details.txt in the HDFS directory /pig_data/, with the following content.



You have loaded this file into Pig with the relation name emp_data as given below.

grunt> emp_data = LOAD 'hdfs://localhost:9000/pig_data/wikitechy_emp_details.txt' USING PigStorage(',')
   as (id:int, name:chararray, age:int, city:chararray);

Now convert the id, name and age of each student (record) into a tuple.

grunt> totuple = FOREACH emp_data GENERATE TOTUPLE (id,name,age);


Now you can verify the contents of the totuple schema using the Dump operator as given below.

grunt> DUMP totuple;

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