[DOCS] CONSTRAINT on ARRAY ELEMENTS

[Nikolaos Ikonomopoulos]

CREATE TABLE employ_presence
(
  p_id character(6) not null,
  p_month character(3) NOT NULL,
  statuscode integer array[7],
  CONSTRAINT unq_employ_presence UNIQUE (p_id, p_month),
  CONSTRAINT chk_employ_month CHECK (p_month = ANY (ARRAY['Jan'::bpchar, 
'Feb'::bpchar, 'Mar'::bpchar, 'Apr'::bpchar, 'May'::bpchar, 'Jun'::bpchar, 
'Jul'::bpchar, 'Aug'::bpchar, 'Sep'::bpchar, 'Oct'::bpchar, 'Nov'::bpchar, 
'Dec'::bpchar]))
);



How can add a CONSTRAINT on statuscode array elements to accept values between 
0 to 5

0 = Employ present
1 = Employ  Patient
2 = day off 
3 = Regular vacation
4 = external job assignment 
5 = external job assignment abroad
6 to 9  for future use

Thanks.