Describe the bug

It's possible to create a stream or table with no value columns using a CREATE TABLE or CREATE STREAM statement. No error is returned.

However, if you try and use the stream or table in a downstream CREATE TABLE AS or CREATE STREAM AS statement you get a error message.

i.e. the table/stream created with no columns isn't useful.

To Reproduce

Currently, you are not able to use middleware per handler in "clean way" (you can still manually wrap the handler function, or have separated router).

It would be nice to be able to add middleware per handler.

As a good reference point, you can use chi router: https://github.com/go-chi/chi

我看到可以通过Prometheus搭建监控环境，如果有图文，更容易理解．