$ nano pfilter.txt
$ cat pfilter.txt
$ hdfs dfs-put pfilter.txt /pigexample
$ pig
grunt> A = LOAD '/pigexample/pfilter.txt' USING PigStorage(',') AS (a1:int,a2:int);
grunt> DUMP A;
grunt> Result = FILTER A BY a2==8;
grunt> DUMP Result;