The webserver framework I was using at the time logged all its queries to the database at the normal log level. It couldn't log an actual query string because we used prepared statements, but it reconstructed the query and substituted the parameters in.

Enormously helpful for debugging an issue, when you can just copy and paste a query out of the serverlogs. Although I would probably have preferred that it not do that at the normal log level.

Curiously, it never logged the http request string/parameters. When I wanted that I had to add my own code to the request handler.