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https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-rolling-restart.html
Create a backup using the ndb_mgm client START BACKUP command prior to performing the restart. Use mysqldump to create a backup prior to the upgrade; afterward, restore the dump using LOAD DATA. To free memory previously allocated to a table by ...
https://dev.mysql.com/doc/refman/8.0/en/obtaining-loadable-function-information.html
The Performance Schema user_defined_functions table contains information about the currently installed loadable functions: SELECT * FROM performance_schema.user_defined_functions; The mysql.func system table also lists installed loadable functions, ...This difference makes user_defined_functions preferable to mysql.func for checking which loadable functions are ...
https://dev.mysql.com/doc/refman/8.0/en/query-attributes.html
INSTALL COMPONENT loads the component, and also registers it in the mysql.component system table to cause it to be loaded during subsequent server startups. To uninstall the query_attributes component, use this statement: UNINSTALL COMPONENT ... The ...
https://dev.mysql.com/doc/refman/8.0/en/query-log.html
Each line that shows when a client connects also includes using connection_type to indicate the protocol used to establish the connection. connection_type is one of TCP/IP (TCP/IP connection established without SSL), SSL/TLS (TCP/IP connection ...
https://dev.mysql.com/doc/refman/8.0/en/replica-logs.html
The mysql.slave_master_info and mysql.slave_relay_log_info tables are created using the transactional storage engine InnoDB. A replica server creates several repositories of information to use for the replication process: The replica's relay log, ...The transactions in the relay log are applied on the replica by the replication SQL (applier) ...
https://dev.mysql.com/doc/refman/8.0/en/spatial-reference-systems.html
MySQL maintains information about available spatial reference systems for spatial data in the data dictionary mysql.st_spatial_reference_systems table, which can store entries for projected and geographic SRSs. This data dictionary table is ... A ...
https://dev.mysql.com/doc/refman/8.0/en/binary-log-transaction-compression.html
In NDB 8.0.31 and later, you can enable binary logging of compressed transactions for tables using the NDB storage engine at run time using the ndb_log_transaction_compression system variable introduced in that release, and control the level of ...
https://dev.mysql.com/doc/refman/8.0/en/blob.html
For example, if a table contains 'a', an attempt to store 'a ' causes a duplicate-key error. This is in contrast to all other data types, for which storage is allocated once per column when the table is opened. A BLOB is a binary large object that ...
https://dev.mysql.com/doc/refman/8.0/en/charset-cp932.html
The table shown at https://msdn.microsoft.com/en-us/goglobal/cc305152.aspx provides information about the Unicode values of cp932 characters. For cp932 table entries with characters under which a four-digit number appears, the number represents the ... Why is cp932 needed? In MySQL, the sjis character set corresponds to the Shift_JIS character set defined by IANA, which supports JIS X0201 and JIS X0208 ...
https://dev.mysql.com/doc/refman/8.0/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 ...