You are reading the documentation for the ECPG programming interface, not normal SQL or psql.
Please see the manual for psql. https://www.postgresql.org/docs/current/static/app-psql.html
You are reading the documentation for the ECPG programming interface, not normal SQL or psql.
Please see the manual for psql. https://www.postgresql.org/docs/current/static/app-psql.html