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https://dev.mysql.com/doc/internals/en/starting-transaction.html
A transaction is started by the storage engine in response to a call to either the start_stmt() or external_lock() methods. If there is no active transaction, the storage engine must start a new transaction and register the transaction with the ...
https://dev.mysql.com/doc/internals/en/status-flags.html
Protocol::StatusFlags Flag Value Comment SERVER_STATUS_IN_TRANS 0x0001 a transaction is active SERVER_STATUS_AUTOCOMMIT 0x0002 auto-commit is enabled SERVER_MORE_RESULTS_EXISTS 0x0008 SERVER_STATUS_NO_GOOD_INDEX_USED 0x0010 ...
https://dev.mysql.com/doc/internals/en/test-faults-usage.html
SET SESSION debug="+d,function_crash_return"; will crash the server while returning from function.
https://dev.mysql.com/doc/internals/en/transformations.html
The Item_subselect virtual method select_transformer is used to rewrite subqueries. It is called from Item_subselect::init (which is called just after the call to the fix_fields() method for all items in JOIN::prepare).
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-metric-innodb-adaptivehashactivity-category.html
Lists the InnoDB Adaptive Hash Activity metrics and provides a brief description of each. Table 6.10 InnoDB Adaptive Hash Activity Metrics NameDescriptionHash Node Heap The total number of (16Kb) pages allocated to the InnoDB adaptive hash index.
https://dev.mysql.com/doc/mysql-em-plugin/en/myoem-performance-page-per-table-stats.html
By default, rows are sorted by descending total wait time (tables with most contention first). Table 5.10 Per Table Statistics Dashboard NameDescription Table Name The table name. Delete Latency The total wait time of timed delete I/O events for the ...
https://dev.mysql.com/doc/workbench/en/wb-images.html
Images exist only on the EER Diagram canvas; you can add them only from the EER Diagram window.
https://dev.mysql.com/doc/connectors/en/connector-odbc-examples-tools.html
Once you have configured your Connector/ODBC DSN, you can access your MySQL database through any application that supports the ODBC interface, including programming languages and third-party applications. This section contains guides and help on ...
https://dev.mysql.com/doc/connectors/en/connector-odbc-usagenotes.html
Here are some common notes and tips for using Connector/ODBC within different environments, applications and tools. The notes provided here are based on the experiences of Connector/ODBC developers and users.
https://dev.mysql.com/doc/connectors/en/connector-python-api-refreshoption.html
RefreshOption.REPLICA On a replica replication server, reset the source server information and restart the replica, like RESET SLAVE.