SELECT '[1,2,3]'::intvec;
 intvec  
---------
 [1,2,3]
(1 row)

SELECT '[-1,-2,-3]'::intvec;
   intvec   
------------
 [-1,-2,-3]
(1 row)

SELECT ' [ 1,  2 ,    3  ] '::intvec;
 intvec  
---------
 [1,2,3]
(1 row)

SELECT '[1.23456]'::intvec;
ERROR:  invalid input syntax for type intvec: "[1.23456]"
LINE 1: SELECT '[1.23456]'::intvec;
               ^
SELECT '[hello,1]'::intvec;
ERROR:  invalid input syntax for type intvec: "[hello,1]"
LINE 1: SELECT '[hello,1]'::intvec;
               ^
SELECT '[127,-128]'::intvec;
   intvec   
------------
 [127,-128]
(1 row)

SELECT '[128,-129]'::intvec;
ERROR:  value "128" is out of range for type intvec
LINE 1: SELECT '[128,-129]'::intvec;
               ^
SELECT '[1,2,3'::intvec;
ERROR:  malformed intvec literal: "[1,2,3"
LINE 1: SELECT '[1,2,3'::intvec;
               ^
DETAIL:  Unexpected end of input.
SELECT '[1,2,3]9'::intvec;
ERROR:  malformed intvec literal: "[1,2,3]9"
LINE 1: SELECT '[1,2,3]9'::intvec;
               ^
DETAIL:  Junk after closing right brace.
SELECT '1,2,3'::intvec;
ERROR:  malformed intvec literal: "1,2,3"
LINE 1: SELECT '1,2,3'::intvec;
               ^
DETAIL:  Vector contents must start with "[".
SELECT ''::intvec;
ERROR:  malformed intvec literal: ""
LINE 1: SELECT ''::intvec;
               ^
DETAIL:  Vector contents must start with "[".
SELECT '['::intvec;
ERROR:  malformed intvec literal: "["
LINE 1: SELECT '['::intvec;
               ^
DETAIL:  Unexpected end of input.
SELECT '[,'::intvec;
ERROR:  malformed intvec literal: "[,"
LINE 1: SELECT '[,'::intvec;
               ^
DETAIL:  Unexpected end of input.
SELECT '[]'::intvec;
ERROR:  intvec must have at least 1 dimension
LINE 1: SELECT '[]'::intvec;
               ^
SELECT '[1,]'::intvec;
ERROR:  invalid input syntax for type intvec: "[1,]"
LINE 1: SELECT '[1,]'::intvec;
               ^
SELECT '[1a]'::intvec;
ERROR:  invalid input syntax for type intvec: "[1a]"
LINE 1: SELECT '[1a]'::intvec;
               ^
SELECT '[1,,3]'::intvec;
ERROR:  malformed intvec literal: "[1,,3]"
LINE 1: SELECT '[1,,3]'::intvec;
               ^
SELECT '[1, ,3]'::intvec;
ERROR:  invalid input syntax for type intvec: "[1, ,3]"
LINE 1: SELECT '[1, ,3]'::intvec;
               ^
SELECT '[1,2,3]'::intvec(3);
 intvec  
---------
 [1,2,3]
(1 row)

SELECT '[1,2,3]'::intvec(2);
ERROR:  expected 2 dimensions, not 3
SELECT '[1,2,3]'::intvec(3, 2);
ERROR:  invalid type modifier
LINE 1: SELECT '[1,2,3]'::intvec(3, 2);
                          ^
SELECT '[1,2,3]'::intvec('a');
ERROR:  invalid input syntax for type integer: "a"
LINE 1: SELECT '[1,2,3]'::intvec('a');
                          ^
SELECT '[1,2,3]'::intvec(0);
ERROR:  dimensions for type intvec must be at least 1
LINE 1: SELECT '[1,2,3]'::intvec(0);
                          ^
SELECT '[1,2,3]'::intvec(16001);
ERROR:  dimensions for type intvec cannot exceed 16000
LINE 1: SELECT '[1,2,3]'::intvec(16001);
                          ^
SELECT unnest('{"[1,2,3]", "[4,5,6]"}'::intvec[]);
 unnest  
---------
 [1,2,3]
 [4,5,6]
(2 rows)

SELECT '{"[1,2,3]"}'::intvec(2)[];
ERROR:  expected 2 dimensions, not 3