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https://dev.mysql.com/doc/internals/en/error-messages-storage-engine.html
To add error messages for table handlers, the following example may be helpful. Purpose: Implement the handler::get_error_message function as ha_federated::get_error_message to return the handler-specific error message. When you have returned the ...
https://dev.mysql.com/doc/internals/en/row-based-binary-logging.html
Logging in this format can be done independent of whether the log is used for replication. That is, replication need not figure into the use of the binary log at all. Similar remarks apply to the terms "statement-based logging" (SBL) versus ...
https://dev.mysql.com/doc/refman/8.4/en/tracing-example.html
Now we can examine the trace, whose first column (QUERY), containing the original statement to be traced, is shown here: SELECT * FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE\G *************************** 1. row *************************** QUERY: SELECT ...
https://dev.mysql.com/doc/internals/en/plugin-services-components.html
On the plugin side of the services interface, the relevant information is provided in a set of header files. A plugin accesses this information by including the plugin.h file (which plugins must include anyway): #include <mysql/plugin.h> plugin.h ...
https://dev.mysql.com/doc/connectors/en/connector-odbc-configuration.html
Before you connect to a MySQL database using the Connector/ODBC driver, you configure an ODBC Data Source Name (DSN). The DSN associates the various configuration parameters required to communicate with a database to a specific name. You use the ...
https://dev.mysql.com/doc/connector-odbc/en/connector-odbc-configuration.html
Before you connect to a MySQL database using the Connector/ODBC driver, you configure an ODBC Data Source Name (DSN). The DSN associates the various configuration parameters required to communicate with a database to a specific name. You use the ...
https://dev.mysql.com/doc/internals/en/sleep.html
In some cases race conditions can be repeated when all but one thread are blocked (for example waiting for an SQL lock). Then the remaining thread has plenty of time to go through the critical piece of code. The problem here is to assure that the ...
https://dev.mysql.com/doc/connectors/en/connector-python-api-mysqlconnection-ping.html
Syntax: cnx.ping(reconnect=False, attempts=1, delay=0) Check whether the connection to the MySQL server is still available. When reconnect is set to True, one or more attempts are made to try to reconnect to the MySQL server, and these options are ...
https://dev.mysql.com/doc/connector-python/en/connector-python-api-mysqlconnection-ping.html
Syntax: cnx.ping(reconnect=False, attempts=1, delay=0) Check whether the connection to the MySQL server is still available. When reconnect is set to True, one or more attempts are made to try to reconnect to the MySQL server, and these options are ...
https://dev.mysql.com/doc/internals/en/optimizer-features-to-trace.html
Some features in the optimizer can be invoked many times during statement optimization and execution, and thus can make the trace grow beyond reason. They are: Greedy search: with a N-table join, this could explore factorial(N) plans Range ...