When I try to do a “SELECT AES_DECRYPT(mycol,'KEY') FROM mycol WHERE id=num; “, I noticed that SQLYog hangs intermittently, more than 50% of the time. You cannot stop the query with the X icon on the toolbar. You need to kill the process. We got this condition on several PCs running Windows 7 with SqlYog Enterprise 8.14 for several different tables where the encrypted data is stored in a column of type longtext or mediumtext.