@@   The @ character.

@B   Date and time that processing of the request started, unless the request could not be queued due to an error.

@C   Date and time that the client connected.

@D   Name of the database associated with the request.

@E   Text of the error message, if an error occurred.

@F   Date and time that processing of the request finished.

@I   IP address of the client.

@L   Length of the response, in bytes, including headers and body.

@M   HTTP request method.

@P   Listener port associated with the request.

@Q   Date and time that the request was queued for processing, unless the request could not be queued due to an error.

@R   Status code and description of the HTTP response.

@S   HTTP status code.

@T   Date and time that the current log entry was written.

@U   Requested URI.

@V   Requested HTTP version.

@W   Time taken to process the request (@F - @B), or 0.000 if the request was not processed due to an error.