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https://dev.mysql.com/doc/internals/en/innodb-user-records.html
In the User Records part of a page, you'll find all the records that the user inserted. There are two ways to navigate through the user records, depending whether you want to think of their organization as an unordered or an ordered list. If you ...
https://dev.mysql.com/doc/refman/8.4/en/example-user-variables.html
You can employ MySQL user variables to remember results without having to store them in temporary variables in the client.
https://dev.mysql.com/doc/refman/8.4/en/ignoring-user.html
If you get the following error, it means that when mysqld was started or when it reloaded the grant tables, it found an account in the user table that had an invalid password. Found wrong password for user 'some_user'@'some_host'; ignoring user As ...To fix this problem, assign a new, valid password to the ...
https://dev.mysql.com/doc/refman/8.4/en/replication-features-user-names.html
The maximum length for user names in MySQL 8.4 is 32 characters. Replication of user names longer than 16 characters fails when the replica runs a version of MySQL previous to 5.7, because those versions support only shorter user names. This occurs ...
https://dev.mysql.com/doc/refman/8.4/en/account-activity-auditing.html
Specifically, do not permit User to be empty (which creates an anonymous-user account), and do not permit pattern characters or netmask notation in Host values. The User and Host column values in this row uniquely identify the account and correspond ... Applications can use the following guidelines to perform SQL-based auditing that ties database activity to MySQL ...
https://dev.mysql.com/doc/refman/8.4/en/problems-connecting.html
(The data directory normally is named data or var and is located under your MySQL installation directory.) Make sure that you have a file named user.MYD in the mysql database directory. $> mysql -u root ERROR 1045 (28000): Access denied for user ...
https://dev.mysql.com/doc/refman/8.4/en/security-against-attack.html
This is extremely dangerous, because any user with the FILE privilege is able to cause the server to create files as root (for example, ~root/.bashrc). The CREATE USER and ALTER USER statements also support resource control options for limiting the ...It is common for client/server applications that the user can specify any user name to the client ...
https://dev.mysql.com/doc/heatwave-aws/en/heatwave-aws-user-configurable-shape-dependent-system-variables.html
User-Configurable Shape-Dependent System Variables 19.6 User-Configurable Shape-Dependent System Variables Shape-dependent global system variables are linked to, and tuned for, a specific MySQL shape. Note: innodb_buffer_pool_instances , ...
https://dev.mysql.com/doc/ndbapi/en/ndb-error-codes-user-defined-error.html
The following list enumerates all NDB errors of type UD (User defined error).
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-user-variable-tables.html
The Performance Schema provides a user_variables_by_thread table that exposes user-defined variables. These are variables defined within a specific session and include a @ character preceding the name; see Section 11.4, “User-Defined Variables”. The user_variables_by_thread table has these columns: THREAD_ID The thread identifier of the session in which the variable is ...