SQL Error Log Plugin

The SQL_ERROR_LOG plugin collects errors sent to clients in a log file defined by sql_error_log_filename, so that they can later be analyzed. The log file can be rotated if sql_error_log_rotate is set.

Errors are logged as they happen and an error will be logged even if it was handled by a condition handler and was never technically sent to the client.

From warnings can also be logged if sql_error_log_warnings is enabled.

Comments are also logged, which can make the log easier to search. But this is only possible if the client does not strip the comments away. For example, the mariadb command-line client only leaves comments when started with the --comments option.

Installing the Plugin

Although the plugin's shared library is distributed with MariaDB by default, the plugin is not actually installed by MariaDB by default. There are two methods that can be used to install the plugin with MariaDB.

The first method can be used to install the plugin without restarting the server. You can install the plugin dynamically by executing or . For example:

The second method can be used to tell the server to load the plugin when it starts up. The plugin can be installed this way by providing the or the options. This can be specified as a command-line argument to or it can be specified in a relevant server in an . For example:

Uninstalling the Plugin

You can uninstall the plugin dynamically by executing or . For example:

If you installed the plugin by providing the or the options in a relevant server in an , then those options should be removed to prevent the plugin from being loaded the next time the server is restarted.

Logging

The log format until is:

Starting from , the format is:

Starting from , , , , , , and , when the variable is enabled, the log also contains thread id and database name. If there is no database, NULL will be displayed.

Each separated by a space or : as above

Example of Logs

With enabled (database test and thread id 4):

Example Usage

Versions

System Variables and Options

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