mysql forgets who is logged in: command denied to user ''@'%'

Question

Running show grants; indicates that I am logged in as a user with all privileges on a database.

Running show table status; results in an er

Answer 1

The answers here helped me with my specific problem. Many thanks! A view was the culprit as described above.

I got into trouble because the database in question was created from a backup of a remote database which had different users. The 'broken' view was 'defined' by a user I didn't have locally. Even root was unable to run the crashing query.

Changed the view's 'DEFINER' to a valid local user and the problem was solved!

ALTER 
DEFINER = 'a_valid_user'@'localhost' 
VIEW my_view
AS 
SELECT ..... 

Check out ALTER VIEW documentation for MySQL 5.5

Many thanks again!