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https://dev.mysql.com/doc/refman/8.0/en/replication-asynchronous-connection-failover-replica.html
In MySQL 8.0.27 and later, asynchronous connection failover for replicas is activated automatically for a replication channel on a Group Replication primary when you set SOURCE_CONNECTION_AUTO_FAILOVER=1 in the CHANGE REPLICATION SOURCE TO ...The ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-create-select.html
Prior to MySQL 8.0.21, the statement is logged as two transactions. As of MySQL 8.0.21, on storage engines that support atomic DDL, it is logged as one transaction. If the destination table exists and IF NOT EXISTS is given, MySQL 8.0 ignores the ...
https://dev.mysql.com/doc/refman/8.0/en/replication-howto-masterstatus.html
In a different session on the source, use the SHOW MASTER STATUS statement to determine the current binary log file name and position: mysql> SHOW MASTER STATUS\G *************************** 1. row *************************** File: mysql-bin.000003 ... To configure the replica to start the replication process at the correct point, you need to note the source's current coordinates within its binary ...
https://dev.mysql.com/doc/refman/8.0/en/replication-multi-source-configuration.html
Replicas in a multi-source replication topology require TABLE repositories for the replica's connection metadata repository and applier metadata repository, which are the default in MySQL 8.0. A multi-source replication topology requires at least ...
https://dev.mysql.com/doc/refman/8.0/en/resignal.html
For information about the diagnostics area, see Section 15.6.7.7, “The MySQL Diagnostics Area”. A condition area contains condition information items, such as the SQLSTATE value, MYSQL_ERRNO, or MESSAGE_TEXT. ERROR 1051 (42S02): Unknown table ...
https://dev.mysql.com/doc/refman/8.0/en/rewriter-query-rewrite-plugin.html
MySQL supports query rewrite plugins that can examine and possibly modify SQL statements received by the server before the server executes them. MySQL distributions include a postparse query rewrite plugin named Rewriter and scripts for installing ...These elements work together to provide statement-rewriting capability: A server-side plugin named Rewriter examines statements and may rewrite them, based on its in-memory cache of rewrite ...
https://dev.mysql.com/doc/refman/8.0/en/selecting-rows.html
As shown in the preceding section, it is easy to retrieve an entire table. But typically you don't want to see the entire table, particularly when it becomes large. Instead, you're usually more interested in answering a particular question, in ...
https://dev.mysql.com/doc/refman/8.0/en/show-engines.html
For information about MySQL storage engines, see Chapter 17, The InnoDB Storage Engine, and Chapter 18, Alternative Storage Engines. row *************************** Engine: FEDERATED Support: NO Comment: Federated MySQL storage engine Transactions: ... SHOW [STORAGE] ENGINES SHOW ENGINES displays status information about the server's storage ...
https://dev.mysql.com/doc/refman/8.0/en/show-index.html
These two statements are equivalent: SHOW INDEX FROM mytable FROM mydb; SHOW INDEX FROM mydb.mytable; The optional EXTENDED keyword causes the output to include information about hidden indexes that MySQL uses internally and are not accessible by ...
https://dev.mysql.com/doc/refman/8.0/en/show-variables.html
SHOW [GLOBAL | SESSION] VARIABLES [LIKE 'pattern' | WHERE expr] SHOW VARIABLES shows the values of MySQL system variables (see Section 7.1.8, “Server System Variables”). These are the values used to initialize the corresponding session ...