inet_server_port()
A system function returning the server IP port
inet_server_port() is a system function which returns the IP port which the current client is connected to.
inet_server_port() was added in PostgreSQL 8.0.
Usage
inet_server_port () → integer
inet_server_port() is called without any arguments, and returns the client IP address as an integer, or NULL if the current connection is via a Unix-domain socket.
Known bug
In PostgreSQL 13 and earlier, inet_server_port() will always return NULL if executed by a parallel worker. This has been fixed for PostgreSQL 14 (commit 5a6f9bce), but has not been backpatched to earlier versions.
Change history
- PostgreSQL 8.0
- added (commit 97d625dd)
Examples
Example output when connected via TCP/IP:
postgres=# SELECT inet_server_port();
inet_server_port
------------------
5433
(1 row)
Example output when connected via a Unix-domain socket:
postgres=# SELECT inet_server_port(); inet_server_port ------------------ (1 row)
References
- PostgreSQL documentation: Session Information Functions