MySQL Enterprise Audit Returns a  JSON  string representing a bookmark for the most recently written audit log event. If the audit log format is not  JSON , an error occurs. The bookmark is a  JSON  hash with  timestamp  and  id  items that uniquely identify the position of an event within the audit log. It is suitable for passing to  audit_log_read()  to indicate to that function the position at which to begin reading. For additional details about the audit log-reading process, see Section 6.4.5.6, “Reading Audit Log Files” . Arguments: None. Return value: A  JSON  string containing a bookmark for success, or  NULL  and an error for failure. Example: Prior to MySQL 8.0.19, string return values are binary  JSON  strings. For information about converting such values to nonbinary strings, see Section 6.4.5.6, “Reading Audit Log Files” . Notes: 1528 Name Cmd-Line Option File System Var Status Var Var Scope Dynamic audit-log Yes Yes audit_log_buffer_size Yes Yes Yes Global No audit_log_compression Yes Yes Yes Global No audit_log_connection_policy Yes Yes Yes Global Yes audit_log_current_session Yes Both No Audit_log_current_size Yes Global No audit_log_encryption Yes Yes Yes Global No Audit_log_event_max_drop_size Yes Global No Audit_log_events Yes Global No Audit_log_events_filtered Yes Global No Audit_log_events_lost Yes Global No Audit_log_events_written Yes Global No audit_log_exclude_accounts Yes Yes Yes Global Yes Table 6.37 Audit Log Option and Variable Reference Audit Log Option and Variable Reference mysql>  SELECT audit_log_read_bookmark(); +-------------------------------------------------+ | audit_log_read_bookmark() | +-------------------------------------------------+ | { "timestamp": "2019-10-03 21:03:44", "id": 0 } | +-------------------------------------------------+ • audit_log_read_bookmark()