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https://dev.mysql.com/doc/connector-python/en/connector-python-api-mysqlcursor-add-attribute.html
Query attributes must be enabled on the server, and are disabled by default. Syntax: cursor.add_attribute(name, value) Adds a new named query attribute to the list, as part of MySQL server's Query Attributes functionality. name: The name must be a ...
https://dev.mysql.com/doc/internals/en/automatic-trace-purging.html
A user who wants to see the trace of another substatement, can enable/disable tracing around the desired substatement, but this requires editing the routine's code, which may not be possible. Thus, if a statement contains substatements (example: ...
https://dev.mysql.com/doc/internals/en/com-set-option.html
Enables capabilities for the current connection to be enabled and disabled: CLIENT_MULTI_STATEMENTS The option operation is one of: Operation Constant Name 0 MYSQL_OPTION_MULTI_STATEMENTS_ON 1 MYSQL_OPTION_MULTI_STATEMENTS_OFF On success it returns ...COM_SET_OPTION: COM_SET_OPTION set options for the current connection response: EOF or ERR payload: 1 [1b] COM_SET_OPTION 2 option ...
https://dev.mysql.com/doc/internals/en/dbug-sleep.html
In cases where the normal server code does not have a block point at the critical place, one can insert an artificial synchronization point. open_tables(...) DBUG_EXECUTE_IF("sleep_open_and_lock_after_open", { const char *old_proc_info= ...
https://dev.mysql.com/doc/internals/en/error-injection.html
So when any *_VALUE* macro clears it, all other *_VALUE* macros are disabled. Note: The ERROR_INJECT framework has been removed in an early 6.0 version. The error injection method is based on the DBUG framework just like the Dbug Sleep method. In ...
https://dev.mysql.com/doc/internals/en/optimizer-trace-system-variable.html
The optimizer_trace system variable has these on/off switches: enabled: allows to enable/disable tracing one_line: if on, the trace will have no whitespace; it's unreadable for humans but readable for JSON parsers (they ignore whitespace); the only ...
https://dev.mysql.com/doc/internals/en/optimizer-tracing-typical-usage.html
# When done with tracing, disable it: SET optimizer_trace="enabled=off"; A session can trace only statements which it executes; it cannot see a trace of another session. # Turn tracing on (it's off by default): SET optimizer_trace="enabled=on"; ...
https://dev.mysql.com/doc/internals/en/plugins.html
For example, several storage engines have been converted to plugins, and they can be selected or disabled at configuration time. Beginning with MySQL 5.1, the server supports a plugin architecture for loading plugins. You can build a plugin as ...
https://dev.mysql.com/doc/internals/en/replication-correct.html
In addition to what we guarantee in (P-rpl-correct), we also guarantee correct replication in the following scenarios: (P-rpl-different-file-system-case-sensitivities) TODO: allowed differences in file system case sensitivity ...
https://dev.mysql.com/doc/internals/en/system-variables-controlling-trace.html
A brief overview from "mysqld --verbose --help": --optimizer-trace=name Controls tracing of the Optimizer: --optimizer-trace-features=name Enables/disables tracing of selected features of the Optimizer: ...