Feature request: A connection property to retreive host name used in specific connection

When multiples hosts are specified, either pool or connection could use any of them (depending on target_session_attrs).

It would be nice to have a way to retrieve the actual (connected) host name, as it was provided in the list, that was used to create a specific connection.

Currently, I found no easy way how to do this. Of course, it is possible to use SELECT inet_server_addr() but this only returns an address, which is not always useful.

Thank you!

首先检查 asyncpg 的连接 API 和池 API，重点关注多个主机和 target_session_attrs 如何选择连接。定义返回的主机名应表示什么，然后针对通过两种受支持路径创建的连接，将结果与主机列表进行核对。