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https://dev.mysql.com/doc/refman/5.7/en/replication-features-memory.html
To replicate this effect to replicas, the first time that the source uses a given MEMORY table after startup, it logs an event that notifies replicas that the table must be emptied by writing a DELETE or (from MySQL 5.7.32) TRUNCATE TABLE statement ... When a replication source server shuts down and restarts, its MEMORY tables become ...
https://dev.mysql.com/doc/refman/5.7/en/replication-options-gtids.html
The MySQL Server system variables described in this section are used to monitor and control Global Transaction Identifiers (GTIDs). For additional information, see Section 16.1.3, “Replication with Global Transaction Identifiers”.
https://dev.mysql.com/doc/refman/5.7/en/reset-master.html
RESET MASTER Warning Use this statement with caution to ensure you do not lose any wanted binary log file data and GTID execution history. For a server where binary logging is enabled (log_bin is ON), RESET MASTER deletes all existing binary log ...
https://dev.mysql.com/doc/refman/5.7/en/server-status-variables.html
The MySQL server maintains many status variables that provide information about its operation. You can view these variables and their values by using the SHOW [GLOBAL | SESSION] STATUS statement (see Section 13.7.5.35, “SHOW STATUS Statement”).
https://dev.mysql.com/doc/refman/5.7/en/time-zone-support.html
This section describes the time zone settings maintained by MySQL, how to load the system tables required for named time support, how to stay current with time zone changes, and how to enable leap-second support. For information about time zone ...
https://dev.mysql.com/doc/refman/5.7/en/alter-table-examples.html
row *************************** Table: t1 Create Table: CREATE TABLE `t2` ( `c1` int(11) DEFAULT NULL ) /*!50100 TABLESPACE ts_1 STORAGE DISK */ ENGINE=ndbcluster DEFAULT CHARSET=latin1 1 row in set (0.01 sec) To change the storage type of an ...For ...
https://dev.mysql.com/doc/refman/5.7/en/enterprise-encryption-functions.html
If the arguments are not suitable to permit a function to perform the requested operation, it returns NULL or 0 as appropriate. MySQL Enterprise Encryption functions have these general characteristics: For arguments of the wrong type or an ...
https://dev.mysql.com/doc/refman/5.7/en/example-auto-increment.html
For example: INSERT INTO animals (id,name) VALUES(0,'groundhog'); If the column is declared NOT NULL, it is also possible to assign NULL to the column to generate sequence numbers. For example: INSERT INTO animals (id,name) VALUES(NULL,'squirrel'); ...You can also explicitly assign 0 to the column to generate sequence numbers, unless the NO_AUTO_VALUE_ON_ZERO SQL mode is ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-functional-dependence.html
A UNIQUE index over a NOT NULL column could be used instead of a primary key and the same functional dependence would apply. As with the previous example, a UNIQUE key over NOT NULL columns could be used instead of a primary key. If in the join ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-transactions-current-table.html
END_EVENT_ID This column is set to NULL when the event starts and updated to the thread current event number when the event ends. If an event is produced from an instrument that has TIMED = NO, timing information is not collected, and TIMER_START, ...The table stores one row per thread showing the current status of the thread's most recent monitored transaction event, so there is no system variable for configuring the table ...