git clone https://github.com/greenlion/columnstore_tests.git
sudo yum install php-cli php-mysql php-pear
cd columnstore_tests
git checkout star
mkdir r
php run_tests --record # record results against MyISAM table
php run_tests --debug | tee out.txt #compare to CS table
Examine out.txt and you will find that the | operator returns wrong results for CS compared to MyISAM in 425 of 1229 tests.

Note that some of these failures are reported in MCOL-192 as well.
Note that there are 81 negative tests - # of failures should match MyISAM