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https://dev.mysql.com/doc/refman/8.4/en/upgrade-before-you-begin.html
Upgrade procedures vary by platform and how the initial installation was performed. The backup should include the mysql system database, which contains the MySQL data dictionary tables and system tables. Important Downgrade from MySQL 8.4 to MySQL ...
https://dev.mysql.com/doc/refman/8.4/en/user-variables.html
If you refer to a variable that has not been initialized, it has a value of NULL and a type of string. You can store a value in a user-defined variable in one statement and refer to it later in another statement. This enables you to pass values ...
https://dev.mysql.com/doc/refman/8.4/en/validate-password-options-variables.html
This applies only when changing an existing password, and has no effect when setting a user account's initial password. This section describes the system and status variables that validate_password provides to enable its operation to be configured ...
https://dev.mysql.com/doc/refman/8.4/en/version-tokens-usage.html
When Version Tokens initializes on a given server, the server's version token list is empty. Before using Version Tokens, install it according to the instructions provided at Section 7.6.6.2, “Installing or Uninstalling Version Tokens”. A ...
https://dev.mysql.com/doc/refman/8.4/en/window-function-descriptions.html
For window function usage information and examples, and definitions of terms such as the OVER clause, window, partition, frame, and peer, see Section 14.20.2, “Window Function Concepts and Syntax”. This section describes nonaggregate window ...
https://dev.mysql.com/doc/refman/8.4/en/windows-pluggable-authentication.html
For example: mysql> SELECT PLUGIN_NAME, PLUGIN_STATUS FROM INFORMATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME LIKE '%windows%'; +------------------------+---------------+ | PLUGIN_NAME | PLUGIN_STATUS | +------------------------+---------------+ | ...
https://dev.mysql.com/doc/refman/8.4/en/x-plugin-encrypted-connections.html
At initialization, X Plugin determines its TLS context for encrypted connections as follows: If all mysqlx_ssl_xxx system variables have their default values, X Plugin uses the same TLS context as the MySQL Server main connection interface, which is ... This section explains how to configure X Plugin to use encrypted ...
https://dev.mysql.com/doc/refman/8.4/en/x-plugin-options-variables.html
If configuration values specified at startup time are incorrect, X Plugin could fail to initialize properly and the server does not load it. This section describes the command options and system variables that configure X Plugin, as well as the ...
https://dev.mysql.com/doc/refman/8.4/en/x-plugin-sha2-cache-plugin.html
Once this initial authentication over SSL has succeeded, non-SSL X Protocol connections can be used. X Plugin supports MySQL user accounts created with the caching_sha2_password authentication plugin. For more information on this plugin, see ...
https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-6.html
NDB Cluster APIs: Excluding a VARCHAR column from an event definition resulted in an Invalid schema object version error. An init file having one or more single lines, each containing multiple SQL statements, sometimes gave rise to errors during ...