Is consistent order maintained in line 9/10?

recommend.pig

pairs = FOREACH pairs GENERATE elem1.follower AS follower, 
                               elem1.repo AS repo1,
                               elem2.repo AS repo2,
                               elem1.rating AS rating1,
                               elem2.rating AS rating2;

by_repos = GROUP pairs BY (repo1, repo2);
gt_5 = FILTER by_repos BY COUNT_STAR(pairs) > 2;
pearson = FOREACH gt_5 GENERATE FLATTEN(group) AS (repo1, repo2), 
                                udfs.cosine(pairs.rating1, pairs.rating2) as similarity;