![]() ![]() Notice that the last value in the log entry is 1142. After the log event type (i.e., QUERY), the database name (i.e., company), the query, and the error number is recorded. Next is the connection and query identification numbers (i.e., 15 and 46). ![]() Looking at this log entry, you can see the date and time of the query, followed by the server host, the user and host for the account. This log entry would be on one line, but it's reformatted here for better rendering. Looking in the Audit Plugin log ( server_audit.log) for this entry, you can see the following entry: 20170817 11 : 07 : 18, ip - 172 - 30 - 0 - 38, bob, localhost, 15, 46, QUERY, company, 'UPDATE employees SET salary = salary * 1.2 WHERE emp_id = 18236', 1142 2 WHERE emp_id = 18236 ERROR 1142 ( 42000 ): UPDATE command denied to user 'bob' 'localhost' for table 'employees' They can also reveal if a malicious user is guessing at the names of tables and columns to try to get access to data.īelow is an example in which a user attempts to execute an UPDATE statement on a table for which he does not have permission: UPDATE employees SET salary = salary * 1. You may find failed queries to be more interesting: They can reveal problems with applications (e.g., an SQL statement in an application that doesn't match the current schema). ![]() These queries can be parsed by the error code that's provided in the log. For example, a query will be logged because of a syntax error or because the user doesn't have the privileges necessary to access an object. Queries are also logged if they cannot be executed, if they're unsuccessful. An alternative is to use TABLE event type instead of the query-related event types. So make sure that only trusted users have access to the log files and that the files are in a protected location. This is a security vulnerability: anyone who has access to the log files will be able to read the queries. The queries will be logged exactly as they are executed, in plain text. If QUERY, QUERY_DDL, QUERY_DML, QUERY_DML_NO_SELECT, and/or QUERY_DCL event types are enabled, then the corresponding types of queries that are executed will be logged for defined users. Connects need to be logged for all types of users access to objects need to be logged only for physical users. This is because auditing standards distinguish between technical and physical users. This list will be ignored, though, for the loggings of connect events. It's possible to define a list of users for which events can be excluded or included for tracing their database activities. For a failed connection, the log includes the error code. If the Audit Plugin has been configured to log connect events, it will log connects, disconnects, and failed connects. Previously, a log entry would be truncated due to long query strings. In the same version, the server_audit_query_log_limit variable was added to be able to set the length of a log record. Starting in version 1.3.0 of the Audit Plugin, there is the QUERY_DCL option for logging DCL types of queries (e.g., GRANT and REVOKE statements). ![]() Since there are other types of queries besides DDL and DML, using the QUERY_DDL and QUERY_DML options together is not equivalent to using QUERY. Similar to QUERY, but filters only DCL-type queries ( CREATE USER, DROP USER, RENAME USER, GRANT, REVOKE and SET PASSWORD statements) (since version 1.4.4) ( DO, CALL, LOAD DATA/XML, DELETE, INSERT, UPDATE, HANDLER and REPLACE statements) Similar to QUERY_DML, but doesn't log SELECT queries. Similar to QUERY, but filters only DML-type queries ( DO, CALL, LOAD DATA/XML, DELETE, INSERT, SELECT, UPDATE, HANDLER and REPLACE statements) RENAME USER is not logged, while CREATE/DROP are only logged from MariaDB 10.2.38, MariaDB 10.3.29, MariaDB 10.4.22, MariaDB 10.5.13 and MariaDB 10.6.5. Similar to QUERY, but filters only DDL-type queries ( CREATE, ALTER, DROP, RENAME and TRUNCATE). Queries executed and their results in plain text, including failed queries due to syntax or permission errors Connects, disconnects and failed connects -including the error code ![]()
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