^ operator returns wrong results in 782 tests of 2186

git clone https://github.com/greenlion/columnstore_tests
sudo yum install php-cli php-mysql php-pear
cd columnstore_tests
git checkout only_carat
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 782 of 2186 tests.