SELECT '{1:1.5,3:3.5}/5'::sparsevec;
    sparsevec    
-----------------
 {1:1.5,3:3.5}/5
(1 row)

SELECT '{1:-2,3:-4}/5'::sparsevec;
   sparsevec   
---------------
 {1:-2,3:-4}/5
(1 row)

SELECT '{1:2.,3:4.}/5'::sparsevec;
  sparsevec  
-------------
 {1:2,3:4}/5
(1 row)

SELECT ' { 1 : 1.5 ,  3  :  3.5  } / 5 '::sparsevec;
    sparsevec    
-----------------
 {1:1.5,3:3.5}/5
(1 row)

SELECT '{1:1.23456}/1'::sparsevec;
   sparsevec   
---------------
 {1:1.23456}/1
(1 row)

SELECT '{1:hello,2:1}/2'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{1:hello,2:1}/2"
LINE 1: SELECT '{1:hello,2:1}/2'::sparsevec;
               ^
SELECT '{1:NaN,2:1}/2'::sparsevec;
ERROR:  NaN not allowed in sparsevec
LINE 1: SELECT '{1:NaN,2:1}/2'::sparsevec;
               ^
SELECT '{1:Infinity,2:1}/2'::sparsevec;
ERROR:  infinite value not allowed in sparsevec
LINE 1: SELECT '{1:Infinity,2:1}/2'::sparsevec;
               ^
SELECT '{1:-Infinity,2:1}/2'::sparsevec;
ERROR:  infinite value not allowed in sparsevec
LINE 1: SELECT '{1:-Infinity,2:1}/2'::sparsevec;
               ^
SELECT '{1:1.5e38,2:-1.5e38}/2'::sparsevec;
        sparsevec         
--------------------------
 {1:1.5e+38,2:-1.5e+38}/2
(1 row)

SELECT '{1:1.5e+38,2:-1.5e+38}/2'::sparsevec;
        sparsevec         
--------------------------
 {1:1.5e+38,2:-1.5e+38}/2
(1 row)

SELECT '{1:1.5e-38,2:-1.5e-38}/2'::sparsevec;
        sparsevec         
--------------------------
 {1:1.5e-38,2:-1.5e-38}/2
(1 row)

SELECT '{1:4e38,2:1}/2'::sparsevec;
ERROR:  "4e38" is out of range for type sparsevec
LINE 1: SELECT '{1:4e38,2:1}/2'::sparsevec;
               ^
SELECT '{1:-4e38,2:1}/2'::sparsevec;
ERROR:  "-4e38" is out of range for type sparsevec
LINE 1: SELECT '{1:-4e38,2:1}/2'::sparsevec;
               ^
SELECT '{1:1e-46,2:1}/2'::sparsevec;
ERROR:  "1e-46" is out of range for type sparsevec
LINE 1: SELECT '{1:1e-46,2:1}/2'::sparsevec;
               ^
SELECT '{1:-1e-46,2:1}/2'::sparsevec;
ERROR:  "-1e-46" is out of range for type sparsevec
LINE 1: SELECT '{1:-1e-46,2:1}/2'::sparsevec;
               ^
SELECT ''::sparsevec;
ERROR:  invalid input syntax for type sparsevec: ""
LINE 1: SELECT ''::sparsevec;
               ^
DETAIL:  Vector contents must start with "{".
SELECT '{'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{"
LINE 1: SELECT '{'::sparsevec;
               ^
SELECT '{ '::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{ "
LINE 1: SELECT '{ '::sparsevec;
               ^
SELECT '{:'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{:"
LINE 1: SELECT '{:'::sparsevec;
               ^
SELECT '{,'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{,"
LINE 1: SELECT '{,'::sparsevec;
               ^
SELECT '{}'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{}"
LINE 1: SELECT '{}'::sparsevec;
               ^
DETAIL:  Unexpected end of input.
SELECT '{}/'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{}/"
LINE 1: SELECT '{}/'::sparsevec;
               ^
SELECT '{}/1'::sparsevec;
 sparsevec 
-----------
 {}/1
(1 row)

SELECT '{}/1a'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{}/1a"
LINE 1: SELECT '{}/1a'::sparsevec;
               ^
DETAIL:  Junk after closing.
SELECT '{ }/1'::sparsevec;
 sparsevec 
-----------
 {}/1
(1 row)

SELECT '{:}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{:}/1"
LINE 1: SELECT '{:}/1'::sparsevec;
               ^
SELECT '{,}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{,}/1"
LINE 1: SELECT '{,}/1'::sparsevec;
               ^
SELECT '{1,}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{1,}/1"
LINE 1: SELECT '{1,}/1'::sparsevec;
               ^
SELECT '{:1}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{:1}/1"
LINE 1: SELECT '{:1}/1'::sparsevec;
               ^
SELECT '{1:}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{1:}/1"
LINE 1: SELECT '{1:}/1'::sparsevec;
               ^
SELECT '{1a:1}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{1a:1}/1"
LINE 1: SELECT '{1a:1}/1'::sparsevec;
               ^
SELECT '{1:1a}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{1:1a}/1"
LINE 1: SELECT '{1:1a}/1'::sparsevec;
               ^
SELECT '{1:1,}/1'::sparsevec;
ERROR:  invalid input syntax for type sparsevec: "{1:1,}/1"
LINE 1: SELECT '{1:1,}/1'::sparsevec;
               ^
SELECT '{1:0,2:1,3:0}/3'::sparsevec;
 sparsevec 
-----------
 {2:1}/3
(1 row)

SELECT '{2:1,1:1}/2'::sparsevec;
ERROR:  indexes must be in ascending order
LINE 1: SELECT '{2:1,1:1}/2'::sparsevec;
               ^
SELECT '{}/5'::sparsevec;
 sparsevec 
-----------
 {}/5
(1 row)

SELECT '{}/-1'::sparsevec;
ERROR:  sparsevec must have at least 1 dimension
LINE 1: SELECT '{}/-1'::sparsevec;
               ^
SELECT '{}/100001'::sparsevec;
ERROR:  sparsevec cannot have more than 100000 dimensions
LINE 1: SELECT '{}/100001'::sparsevec;
               ^
SELECT '{0:1}/1'::sparsevec;
ERROR:  index "0" is out of range for type sparsevec
LINE 1: SELECT '{0:1}/1'::sparsevec;
               ^
SELECT '{2:1}/1'::sparsevec;
ERROR:  index must be less than or equal to dimensions
LINE 1: SELECT '{2:1}/1'::sparsevec;
               ^
SELECT '{}/3'::sparsevec(3);
 sparsevec 
-----------
 {}/3
(1 row)

SELECT '{}/3'::sparsevec(2);
ERROR:  expected 2 dimensions, not 3
SELECT '{}/3'::sparsevec(3, 2);
ERROR:  invalid type modifier
LINE 1: SELECT '{}/3'::sparsevec(3, 2);
                       ^
SELECT '{}/3'::sparsevec('a');
ERROR:  invalid input syntax for type integer: "a"
LINE 1: SELECT '{}/3'::sparsevec('a');
                       ^
SELECT '{}/3'::sparsevec(0);
ERROR:  dimensions for type sparsevec must be at least 1
LINE 1: SELECT '{}/3'::sparsevec(0);
                       ^
SELECT '{}/3'::sparsevec(100001);
ERROR:  dimensions for type sparsevec cannot exceed 100000
LINE 1: SELECT '{}/3'::sparsevec(100001);
                       ^