asterisk=# \d ast_monitor
                             Table "public.ast_monitor"
   Column    |  Type   |                          Modifiers                          
-------------+---------+-------------------------------------------------------------
 id          | integer | not null default nextval('public.ast_monitor_id_seq'::text)
 ast_user_id | bigint  | not null
Indexes:
    "ast_monitor_pk" primary key, btree (id)
Foreign-key constraints:
    "ast_user_id_fk" FOREIGN KEY (ast_user_id) REFERENCES ast_user(id) ON UPDATE CASCADE ON DELETE CASCADE

asterisk=# \d cdr
                 Table "public.cdr"
   Column    |           Type           | Modifiers 
-------------+--------------------------+-----------
 calldate    | timestamp with time zone | 
 clid        | character varying(80)    | 
 src         | character varying(80)    | 
 dst         | character varying(80)    | 
 dcontext    | character varying(80)    | 
 channel     | character varying(80)    | 
 dstchannel  | character varying(80)    | 
 lastapp     | character varying(80)    | 
 lastdata    | character varying(80)    | 
 duration    | integer                  | 
 billsec     | integer                  | 
 accountcode | character varying(20)    | 
 uniqueid    | character varying(15)    | not null
 userfield   | character varying(255)   | 
 answer      | timestamp with time zone | 
 disposition | character varying(20)    | 
 amaflags    | character varying(20)    | 
Indexes:
    "cdr_pk" primary key, btree (uniqueid)