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https://dev.mysql.com/doc/refman/5.7/en/information-schema-table-privileges-table.html
The TABLE_PRIVILEGES table has these columns: GRANTEE The name of the account to which the privilege is granted, in 'user_name'@'host_name' format. TABLE_CATALOG The name of the catalog to which the table belongs. TABLE_SCHEMA The name of the schema ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-add-node.html
This section describes how to add NDB Cluster data nodes “online”—that is, without needing to shut down the cluster completely and restart it as part of the process. Important Currently, you must add new data nodes to an NDB Cluster as part ...
https://dev.mysql.com/doc/refman/5.7/en/mysqlbinlog-server-id.html
When invoked with the --read-from-remote-server option, mysqlbinlog connects to a MySQL server, specifies a server ID to identify itself, and requests binary log files from the server. You can use mysqlbinlog to request log files from a server in ...
https://dev.mysql.com/doc/refman/5.7/en/replication-semisync-monitoring.html
To check their values, use SHOW STATUS: mysql> SHOW STATUS LIKE 'Rpl_semi_sync%'; When the source switches between asynchronous or semisynchronous replication due to commit-blocking timeout or a replica catching up, it sets the value of the ... The ...
https://dev.mysql.com/doc/refman/5.7/en/symbolic-links.html
You can move databases or tables from the database directory to other locations and replace them with symbolic links to the new locations. You might want to do this, for example, to move a database to a file system with more free space or increase ...
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-thread-id.html
Returns the Performance Schema thread ID assigned to a given connection ID, or the thread ID for the current connection if the connection ID is NULL. Parameters in_connection_id BIGINT UNSIGNED: The ID of the connection for which to return the ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-examples.html
Identifying Blocking Transactions It is sometimes helpful to identify which transaction blocks another. Each session corresponds to a MySQL thread, and executes one transaction after another. For example, if the blocking_pid is 6, issue this query: ...The tables that contain information about InnoDB transactions and data locks enable you to determine which transaction is waiting for another, and which resource is being ...
https://dev.mysql.com/doc/refman/5.7/en/constraint-invalid-data.html
MySQL permits you to store certain incorrect date values into DATE and DATETIME columns (such as '2000-02-31' or '2000-02-00'). If you try to store NULL into a column that does not take NULL values, an error occurs for single-row INSERT statements.
https://dev.mysql.com/doc/refman/5.7/en/do.html
In most respects, DO is shorthand for SELECT expr, ..., but has the advantage that it is slightly faster when you do not care about the result. DO is useful primarily with functions that have side effects, such as RELEASE_LOCK(). It cannot be used ...
https://dev.mysql.com/doc/refman/5.7/en/converting-tables-to-innodb.html
Make sure that any error handlers in your application also ROLLBACK incomplete changes or COMMIT completed changes. Handling Deadlocks You might see warning messages referring to “deadlocks” in the MySQL error log, or the output of SHOW ENGINE ... If you have MyISAM tables that you want to convert to InnoDB for better reliability and scalability, review the following guidelines and tips before ...