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https://dev.mysql.com/doc/refman/8.4/en/component-loading.html
For example: INSTALL COMPONENT 'file://component_validate_password'; UNINSTALL COMPONENT 'file://component_validate_password'; A loader service handles component loading and unloading, and also registers loaded components in the mysql.component ...
https://dev.mysql.com/doc/refman/8.4/en/controlling-optimizer.html
The server maintains histogram statistics about column values in the column_statistics data dictionary table (see Section 10.9.6, “Optimizer Statistics”). Like other data dictionary tables, this table is not directly accessible by users. MySQL ...
https://dev.mysql.com/doc/refman/8.4/en/controlling-query-plan-evaluation.html
For join queries, the number of possible plans investigated by the MySQL optimizer grows exponentially with the number of tables referenced in a query. For small numbers of tables (typically less than 7 to 10) this is not a problem. The behavior of ... The task of the query optimizer is to find an optimal plan for executing an SQL ...
https://dev.mysql.com/doc/refman/8.4/en/copying-databases.html
Check the description for the mysqldump --set-gtid-purged option to find what happens with the versions you are using, and how to change the behavior if the outcome of the default behavior is not suitable for your situation. For large tables, this ... In cases where you need to transfer databases between different architectures, you can use mysqldump to create a file containing SQL ...
https://dev.mysql.com/doc/refman/8.4/en/data-dictionary-object-cache.html
The tablespace_definition_cache option sets a limit for the number of tablespace definition objects that can be stored in the dictionary object cache. The table definition cache partition exists in parallel with the table definition cache that is ...
https://dev.mysql.com/doc/refman/8.4/en/data-dictionary-transactional-storage.html
The data dictionary schema stores dictionary data in transactional (InnoDB) tables. Data dictionary tables are located in the mysql database together with non-data dictionary system tables. Data dictionary tables are created in a single InnoDB ...
https://dev.mysql.com/doc/refman/8.4/en/data-masking-component-functions.html
The string must be a suitable length for the Primary Account Number, but is not otherwise checked. Warning Values returned from gen_rnd_canada_sin() should be used only for test purposes, and are not suitable for publication. Warning Values returned ...mask_canada_sin(str [, mask_char]) Masks a Canada Social Insurance Number (SIN) and returns the number with all meaningful digits replaced by 'X' ...
https://dev.mysql.com/doc/refman/8.4/en/data-masking-plugin-usage.html
Suppose that a customer table containing customer records has these columns: id: Customer ID number. Creating Views that Display Masked Data If masked data from a table is used for multiple queries, it may be convenient to define a view that ...
https://dev.mysql.com/doc/refman/8.4/en/delete-optimization.html
The time required to delete individual rows in a MyISAM table is exactly proportional to the number of indexes. To delete all rows from a MyISAM table, TRUNCATE TABLE tbl_name is faster than DELETE FROM tbl_name. Truncate operations are not ...To ...
https://dev.mysql.com/doc/refman/8.4/en/drop-database.html
DROP {DATABASE | SCHEMA} [IF EXISTS] db_name DROP DATABASE drops all tables in the database and deletes the database. Dropping a database does not remove any TEMPORARY tables that were created in that database. TEMPORARY tables are automatically ...