\dn
    list [non-sys] schemas
\dt
    list tables

current_schemas(true)
    pg_temp_<N>, pg_catalog, public, app

search_path
    pg_temp (pg_temp_<N>)
    $user
    gp_catalog
    public

alter database <dbname> set search_path=...;

alter table <tablename> set schema=...;

create schema...
drop schema ... drop cascade;