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https://dev.mysql.com/doc/refman/8.0/en/sys-schema-object-index.html
The following tables list sys schema objects and provide a short description of each one.
https://dev.mysql.com/doc/refman/8.0/en/uninstall-plugin.html
If you are uninstalling a plugin with no intention of reinstalling it later and you care about the table contents, you should dump the table with mysqldump and remove the WITH PARSER clause from the dumped CREATE TABLE statement so that you can ...
https://dev.mysql.com/doc/refman/8.0/en/except.html
As with UNION and INTERSECT, either query block can make use of any of SELECT, TABLE, or VALUES. query_expression_body EXCEPT [ALL | DISTINCT] query_expression_body [EXCEPT [ALL | DISTINCT] query_expression_body] [...] query_expression_body: See ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-consumer-filtering.html
For example, if you do not care about historical event information, disable the history consumers: UPDATE performance_schema.setup_consumers SET ENABLED = 'NO' WHERE NAME LIKE '%history%'; The consumer settings in the setup_consumers table form a ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-tablespace-autoextend-size.html
When a file-per-table or general tablespace is created with a non-zero AUTOEXTEND_SIZE setting, the tablespace is initialized at the specified AUTOEXTEND_SIZE size. For tables created in file-per-table tablespaces, SHOW CREATE TABLE shows the ... By ...For information about extent size, see Section 17.11.2, “File Space ...
https://dev.mysql.com/doc/refman/8.0/en/data-directory-initialization.html
Data directory initialization creates time zone tables in the mysql schema but does not populate them. Within the data directory, the server creates the mysql system schema and its tables, including the data dictionary tables, grant tables, time ...
https://dev.mysql.com/doc/refman/8.0/en/alter-user.html
The latter corresponds to the type of value displayed by SHOW CREATE USER for password hashes containing unprintable characters when the print_identified_with_as_hex system variable is enabled. In most cases, ALTER USER requires the global CREATE ...
https://dev.mysql.com/doc/refman/8.0/en/cache-index.html
A key cache must exist before you assign indexes to it, or an error occurs: mysql> CACHE INDEX t1 IN non_existent_cache; ERROR 1284 (HY000): Unknown key cache 'non_existent_cache' By default, table indexes are assigned to the main (default) key ...| ...| tbl_name PARTITION (partition_list) } IN key_cache_name tbl_index_list: tbl_name [{INDEX|KEY} (index_name[, index_name] ...)] partition_list: { partition_name[, partition_name] ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-sets.html
Miscellaneous Information The xxx_general_mysql500_ci collations preserve the pre-5.1.24 ordering of the original xxx_general_ci collations and permit upgrades for tables created before MySQL 5.1.24 (Bug #27877). Beginning with MySQL 8.0.28, utf8mb3 ... This section describes the collations available for Unicode character sets and their differentiating ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-start.html
myisam_max_sort_file_size The maximum size of the temporary file that MySQL is permitted to use while re-creating a MyISAM index (during REPAIR TABLE, ALTER TABLE, or LOAD DATA). If the server finds an error, it tries to do a fast table repair (with ... The following options to mysqld can be used to change the behavior of MyISAM ...