Install cl-pg by entering the following commands in the terminal:
sudo apt update sudo apt install cl-pg
Common Lisp library that provides a socket level postgresql interface
Pg is a socket-level interface to the PostgreSQL object-relational Database. The Library implements the client part of the frontend/backend protocol, so does not require interfacing with the libpq library. SQL types are converted to the equivalent Common Lisp types where possible. Supports large objects (BLOBs).