$ nano pdistinct.txt
$ cat pdistinct.txt
$ hdfs dfs-put pdistinct.txt /pigexample
$ pig
grunt> A = LOAD '/pigexample/pdistinct.txt' USING PigStorage(',') as (a1:int,a2:int,a3:int);
grunt> DUMP A;
grunt> Result = DISTINCT A;
grunt> DUMP Result;