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https://dev.mysql.com/doc/refman/8.0/en/trigger-syntax.html
For example, you can have two BEFORE UPDATE triggers for a table. In an UPDATE trigger, you can use OLD.col_name to refer to the columns of a row before it is updated and NEW.col_name to refer to the columns of the row after it is updated. In a ...
https://dev.mysql.com/doc/refman/8.0/en/replication-mode-change-online-disable-gtids.html
However, if you have the possibility to take the servers offline when disabling GTIDs mode that process is easier. You cannot disable GTID transactions if this option is set together with the --log-slave-updates option (which is the default) and ...
https://dev.mysql.com/doc/refman/8.0/en/create-trigger.html
CREATE [DEFINER = user] TRIGGER [IF NOT EXISTS] trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW [trigger_order] trigger_body trigger_time: { BEFORE | AFTER } trigger_event: { INSERT | UPDATE | DELETE } trigger_order: { FOLLOWS | ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-consistent-read.html
This exception causes the following anomaly: If you update some rows in a table, a SELECT sees the latest version of the updated rows, but it might also see older versions of any rows. If other sessions simultaneously update the same table, the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-member-actions.html
By default, super read-only mode is disabled on the primary when it is elected, so that the primary becomes read-write, and accepts updates from a replication source server and from clients. If the server where you use the functions to configure a ... From MySQL 8.0.26, Group Replication has the capability to set actions for the members of a group to take in specified ...
https://dev.mysql.com/doc/refman/8.0/en/replication-rbr-usage.html
However, in MySQL 8.0, you cannot switch from row-based or mixed format for binary logging to statement-based format at runtime, due to any CREATE TEMPORARY TABLE statements having been omitted from the binary log in the previous mode. The MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/replication-functions-synchronization.html
It blocks until the replica has read and applied all updates up to the specified position in the source's binary log. On a multithreaded replica, the function waits until expiry of the limit set by the replica_checkpoint_group, ... The functions ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-init-startup-configuration.html
InnoDB is a transaction-safe (ACID compliant) storage engine with commit, rollback, and crash-recovery capabilities to protect user data. The doublewrite buffer adds safety to recovery following an unexpected exit or power outage, and improves ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-crash-recovery.html
If you run myisamchk to check tables that mysqld is updating at the same time, you may get a warning that a table is corrupt even when it is not. In this case, if the server tries to update a table that myisamchk is using, the server waits for ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-data-node-memory-management.html
It also holds table rows as they are updated, before the next commit writes them to data memory. MaxNoOfConcurrentOperations limits the number of operations that can be active at any one time in updating transactions. While its value can be ... All ...