Sorting on Pig Latin - sorting

Question

I'm testing the following example from Apache Pig docs:
http://pig.apache.org/docs/r0.14.0/basic.html#order-by
but the sort function seems to be not working. Any idea?
$ pig -version
Apache Pig version 0.14.0 (r1640057)
compiled Nov 16 2014, 18:02:05
grunt> a= load 'data' as (c1:int, c2:int, c3:int);
grunt> describe a;
a: {c1: int,c2: int,c3: int}
grunt> dump a;
(1,2,3)
(4,2,1)
(8,3,4)
(4,3,3)
(7,2,5)
(8,4,3)
grunt> result = order a by c1 desc;
grunt> dump result;
(8,4,3)
(8,3,4)
(4,3,3)
(4,2,1)
(1,2,3)
(7,2,5)
grunt> result = order a by c2 desc;
grunt> dump result;
(8,4,3)
(7,2,5)
(4,2,1)
(1,2,3)
(4,3,3)
(8,3,4)
grunt> result = order a by c3 desc;
grunt> dump result;
(7,2,5)
(4,3,3)
(8,4,3)
(1,2,3)
(4,2,1)
(8,3,4)

Answer 1

You are loading the data using default delimiter(tab) but your actual input data is not properly delimited by tab. Can you make sure that your input data fields are delimited by tab in the file 'data'.
In the below example each input field is delimited by tab and its working fine.
data:
1<TAB>2<TAB>3
4<TAB>2<TAB>1
8<TAB>3<TAB>4
4<TAB>3<TAB>3
7<TAB>2<TAB>5
8<TAB>4<TAB>3
grunt> a= load 'data' as (c1:int, c2:int, c3:int);
(1,2,3)
(4,2,1)
(8,3,4)
(4,3,3)
(7,2,5)
(8,4,3)
grunt> result = order a by c1 desc;
grunt> dump result;
(8,3,4)
(8,4,3)
(7,2,5)
(4,2,1)
(4,3,3)
(1,2,3)
grunt> result = order a by c2 desc;
grunt> dump result;
(8,4,3)
(8,3,4)
(4,3,3)
(1,2,3)
(4,2,1)
(7,2,5)
grunt> result = order a by c3 desc;
grunt> dump result;
(7,2,5)
(8,3,4)
(1,2,3)
(4,3,3)
(8,4,3)
(4,2,1)