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https://dev.mysql.com/doc/refman/8.0/en/partitioning-management-hash-key.html
However, you can merge HASH or KEY partitions using ALTER TABLE ... ADD PARTITION as shown here: ALTER TABLE clients ADD PARTITION PARTITIONS 6; . Tables which are partitioned by hash or by key are very similar to one another with regard to making ...
https://dev.mysql.com/doc/refman/8.0/en/rebuilding-tables.html
Methods for rebuilding a table include: Dump and Reload Method ALTER TABLE Method REPAIR TABLE Method Dump and Reload Method If you are rebuilding tables because a different version of MySQL cannot handle them after a binary (in-place) upgrade or ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-differing-tables.html
Source and target tables for replication do not have to be identical. A table on the source can have more or fewer columns than the replica's copy of the table. In addition, corresponding table columns on the source and the replica can use ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-progress-reporting.html
The following sys schema views provide progress reporting for long-running transactions: processlist session x$processlist x$session Assuming that the required instruments and consumers are enabled, the progress column of these views shows the ...
https://dev.mysql.com/doc/refman/8.0/en/upgrade-prerequisites.html
To identify such tables, execute this query: SELECT TABLE_SCHEMA, TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE ENGINE NOT IN ('innodb', 'ndbcluster') AND CREATE_OPTIONS LIKE '%partitioned%'; Any table reported by the query must be altered to use ... Before upgrading to the latest MySQL 8.0 release, ensure the upgrade readiness of your current MySQL 5.7 or MySQL 8.0 server instance by performing the preliminary checks described ...
https://dev.mysql.com/doc/refman/8.0/en/user-resources.html
To modify the limits for an existing account, use ALTER USER. To modify limits for an existing account, use an ALTER USER statement. The following statement changes the query limit for francis to 100: mysql> ALTER USER 'francis'@'localhost' WITH ...
https://dev.mysql.com/doc/refman/8.0/en/added-deprecated-removed.html
innodb_tmpdir: Directory location for temporary table files created during online ALTER TABLE operations. innodb_api_enable_mdl: Locks table used by InnoDB memcached plugin, so that it cannot be dropped or altered by DDL through SQL interface.
https://dev.mysql.com/doc/refman/8.0/en/assigning-passwords.html
Operations that assign or modify passwords are permitted only to users with the CREATE USER privilege, or, alternatively, privileges for the mysql database (INSERT privilege to create new accounts, UPDATE privilege to modify existing accounts). If ... Required credentials for clients that connect to the MySQL server can include a ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-installation.html
Alternatively, you can reinstall the plugin after upgrading MySQL to load new functions. For example: mysql> CREATE DATABASE IF NOT EXISTS database-name; Next, run the script using the alternative database name. This section describes how to ...
https://dev.mysql.com/doc/refman/8.0/en/creating-spatial-indexes.html
To drop spatial indexes, use ALTER TABLE or DROP INDEX: With ALTER TABLE: ALTER TABLE geom DROP INDEX g; With DROP INDEX: DROP INDEX g ON geom; Example: Suppose that a table geom contains more than 32,000 geometries, which are stored in the column g ... For InnoDB and MyISAM tables, MySQL can create spatial indexes using syntax similar to that for creating regular indexes, but using the SPATIAL ...