When you query column C after the RENAME operation, no errors are reported. To create a new MySQL user account, run the following command: CREATE USER 'newuser''localhost' IDENTIFIED BY 'userpassword' Replace newuser with the new user name, and userpassword with the user password. These variables are optional, used in conjunction to create a new user and to. In this case, no errors are reported, and the system maps column C to the third column of the base table. FROM tablename WHERE condition Note: A view always shows up-to-date data The database engine recreates the view, every time a user queries it. MySQL is a widely used, open-source relational database management system. You can use the SHOW CREATE VIEW command to view the entire CREATE syntax used when creating a view: SHOW CREATE VIEW .In AnalyticDB for MySQL of versions earlier than 3.1.9.0, the system only checks whether the number of columns in a view is the same as the number of columns that are referenced by the asterisk ( *). The er table contains information about users that have permission to access the MySQL server, along with their global privileges. So, is it possible to create a MySQL user that only has access to a single VIEW Can this user also be made so they read-only access to that VIEW Thanks PS: What I call users in my example are really subsidiary offices that want to access their records with their own applications. The system reports an error in the parsing stage regardless of whether column C is used for query. This is an expected result because the parsing stage that contains SQL syntax check and authentication is earlier than the optimization stage in which columns are removed. For example, when you rename column C as column D, the system fails to find column C when it references column A, column B, and column C, and then reports an error. The compatibility of AnalyticDB for MySQL clusters of V3.1.9.0 or later with MySQL behavior may cause special impacts. Note For more information about how to view the minor engine version of a cluster, see How can I view the version of an AnalyticDB for MySQL cluster? To update the minor engine version of a cluster, contact technical support.
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