there is no way for user to revert back and this check should be done in alter table function.
committed. Thanks Prasad!!
updated two test outputs to match the incorrect spelling
some of the tests failed due to the change in the error message. Can you recapture and upload a new patch.
fixed the spelling mistake
Looks fine to me.
The error message though has a misspelling for column...
Can you fix that. I will check it in once that is done...
previous patch was relative ql instead of hive/trunk