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https://dev.mysql.com/doc/refman/8.0/en/thread-pool-elements.html
Prior to MySQL 8.0.14, the monitoring tables are INFORMATION_SCHEMA tables; see Section 28.5, “INFORMATION_SCHEMA Thread Pool Tables”. The INFORMATION_SCHEMA tables now are deprecated; expect them to be removed in a future version of MySQL. For ...
https://dev.mysql.com/doc/refman/8.0/en/values.html
VALUES is a DML statement introduced in MySQL 8.0.19 which returns a set of one or more rows as a table. In other words, it is a table value constructor which also functions as a standalone SQL statement. You should also bear in mind that ROW() is ...VALUES row_constructor_list [ORDER BY column_designator] [LIMIT number] row_constructor_list: ROW(value_list)[, ROW(value_list)][, ...] value_list: value[, value][, ...] column_designator: column_index The VALUES statement consists of the VALUES keyword followed by a list of one or more row constructors, separated by ...
https://dev.mysql.com/doc/refman/8.0/en/constraint-foreign-key.html
MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements. Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL ...The available referential actions are RESTRICT, CASCADE, SET NULL, and NO ACTION (the ...
https://dev.mysql.com/doc/refman/8.0/en/data-dictionary-file-removal.html
ddl_log.log file: The file contained records of metadata operations generated by data definition statements such as DROP TABLE and ALTER TABLE. Unless otherwise noted, data previously stored in metadata files is now stored in data dictionary tables.
https://dev.mysql.com/doc/refman/8.0/en/faqs-views.html
What happens to a view if an underlying table is dropped or renamed? After a view has been created, it is possible to drop or alter a table or view to which the definition refers. What happens to a view if an underlying table is dropped or renamed? ...Can you insert into views that are based on joins? ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-read-only-instance.html
The same restriction applies to any operation that modifies data dictionary tables, such as ANALYZE TABLE and ALTER TABLE tbl_name ENGINE=engine_name. You can query InnoDB tables where the MySQL data directory is on read-only media by enabling the ...How to Enable To prepare an instance for read-only operation, make sure all the necessary information is flushed to the data files before storing it on the read-only ...
https://dev.mysql.com/doc/refman/8.0/en/keywords.html
Certain keywords, such as SELECT, DELETE, or BIGINT, are reserved and require special treatment for use as identifiers such as table and column names. Reserved words are permitted as identifiers if you quote them as described in Section 11.2, ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-importing-data.html
You may also wish to do this when performing bulk DELETE or UPDATE operations on NDB Cluster tables. If a data import operation does not complete successfully, for whatever reason, you should be prepared to perform any necessary cleanup including ...
https://dev.mysql.com/doc/refman/8.0/en/create-procedure.html
By default, MySQL automatically grants the ALTER ROUTINE and EXECUTE privileges to the routine creator. The following example shows a simple stored procedure that, given a country code, counts the number of cities for that country that appear in the ...By default, a stored routine is associated with the default ...
https://dev.mysql.com/doc/refman/8.0/en/socket-pluggable-authentication.html
Alternatively, to load the plugin at runtime, use this statement: INSTALL PLUGIN auth_socket SONAME 'auth_socket.so'; INSTALL PLUGIN loads the plugin immediately, and also registers it in the mysql.plugins system table to cause the server to load it ...To verify plugin installation, examine the Information Schema PLUGINS table or use the SHOW PLUGINS statement (see Section 7.6.2, “Obtaining Server Plugin ...