![]() When you query column C after the RENAME operation, no errors are reported. In this case, no errors are reported, and the system maps column C to the third column of the base table. 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 ( *). Stage 2: Assuming that you can connect, the server checks each statement you issue to. The system reports an error in the parsing stage regardless of whether column C is used for query. MySQL access control involves two stages when you run a client program that connects to the server: Stage 1: The server accepts or rejects the connection based on your identity and whether you can verify your identity by supplying the correct password. ![]() ![]() viewname is a unique name of the view you are creating. is the name of the database where your view will be created if not specified, the view will be created in the current database. The CREATE ROLE privilege is a lesser version of the CREATE USER privilege, allowing you to create and manage roles. 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. 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. The basic syntax for creating a view in MySQL is as follows: CREATE VIEW dbname.viewname (columnlist) AS select-statement dbname. Replace name with the name of the view, and replace query with the SQL query. To create the view explicitly in a given database, use dbname.viewname syntax to qualify the view name with the database name: CREATE VIEW test.v AS SELECT FROM t Unqualified table or view names in the SELECT statement are also interpreted with respect to the default database. ![]() 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. As you can see, the basic syntax to create a view is CREATE VIEW name AS query. The compatibility of AnalyticDB for MySQL clusters of V3.1.9.0 or later with MySQL behavior may cause special impacts. For an overview, see Cloud SQL built-in database. To 'user''hostname' IDENTIFIED BY 'password' If you are running the code/site accessing MySQL on the same machine, hostname would be localhost. 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. List users Change a user password MySQL PostgreSQL SQL Server This page describes how to enable and use Cloud SQL built-in authentication. Try this to create the user: CREATE USER 'user''hostname' Try this to give it access to the database dbTest: GRANT ALL PRIVILEGES ON dbTest. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |