$ nano pforeach.txt
$ cat pforeach.txt
$ hdfs dfs-put pforeach.txt /pigexample
$ pig
grunt> A = LOAD '/pigexample/pforeach.txt' USING PigStorage(',') AS (a1:int,a2:int,a3:int) ;
grunt> DUMP A;
grunt> fe = FOREACH A generate a1,a2; grunt> DUMP fe;