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|
-- Strings.
SELECT '""'::json; -- OK.
json
------
""
(1 row)
SELECT $$''$$::json; -- ERROR, single quotes are not allowed
ERROR: invalid input syntax for type json
LINE 1: SELECT $$''$$::json;
^
DETAIL: Token "'" is invalid.
CONTEXT: JSON data, line 1: '...
SELECT '"abc"'::json; -- OK
json
-------
"abc"
(1 row)
SELECT '"abc'::json; -- ERROR, quotes not closed
ERROR: invalid input syntax for type json
LINE 1: SELECT '"abc'::json;
^
DETAIL: Token ""abc" is invalid.
CONTEXT: JSON data, line 1: "abc
SELECT '"abc
def"'::json; -- ERROR, unescaped newline in string constant
ERROR: invalid input syntax for type json
LINE 1: SELECT '"abc
^
DETAIL: Character with value 0x0a must be escaped.
CONTEXT: JSON data, line 1: "abc
SELECT '"\n\"\\"'::json; -- OK, legal escapes
json
----------
"\n\"\\"
(1 row)
SELECT '"\v"'::json; -- ERROR, not a valid JSON escape
ERROR: invalid input syntax for type json
LINE 1: SELECT '"\v"'::json;
^
DETAIL: Escape sequence "\v" is invalid.
CONTEXT: JSON data, line 1: "\v...
SELECT '"\u"'::json; -- ERROR, incomplete escape
ERROR: invalid input syntax for type json
LINE 1: SELECT '"\u"'::json;
^
DETAIL: "\u" must be followed by four hexadecimal digits.
CONTEXT: JSON data, line 1: "\u"
SELECT '"\u00"'::json; -- ERROR, incomplete escape
ERROR: invalid input syntax for type json
LINE 1: SELECT '"\u00"'::json;
^
DETAIL: "\u" must be followed by four hexadecimal digits.
CONTEXT: JSON data, line 1: "\u00"
SELECT '"\u000g"'::json; -- ERROR, g is not a hex digit
ERROR: invalid input syntax for type json
LINE 1: SELECT '"\u000g"'::json;
^
DETAIL: "\u" must be followed by four hexadecimal digits.
CONTEXT: JSON data, line 1: "\u000g...
SELECT '"\u0000"'::json; -- OK, legal escape
json
----------
"\u0000"
(1 row)
SELECT '"\uaBcD"'::json; -- OK, uppercase and lower case both OK
json
----------
"\uaBcD"
(1 row)
-- Numbers.
SELECT '1'::json; -- OK
json
------
1
(1 row)
SELECT '0'::json; -- OK
json
------
0
(1 row)
SELECT '01'::json; -- ERROR, not valid according to JSON spec
ERROR: invalid input syntax for type json
LINE 1: SELECT '01'::json;
^
DETAIL: Token "01" is invalid.
CONTEXT: JSON data, line 1: 01
SELECT '0.1'::json; -- OK
json
------
0.1
(1 row)
SELECT '9223372036854775808'::json; -- OK, even though it's too large for int8
json
---------------------
9223372036854775808
(1 row)
SELECT '1e100'::json; -- OK
json
-------
1e100
(1 row)
SELECT '1.3e100'::json; -- OK
json
---------
1.3e100
(1 row)
SELECT '1f2'::json; -- ERROR
ERROR: invalid input syntax for type json
LINE 1: SELECT '1f2'::json;
^
DETAIL: Token "1f2" is invalid.
CONTEXT: JSON data, line 1: 1f2
SELECT '0.x1'::json; -- ERROR
ERROR: invalid input syntax for type json
LINE 1: SELECT '0.x1'::json;
^
DETAIL: Token "0.x1" is invalid.
CONTEXT: JSON data, line 1: 0.x1
SELECT '1.3ex100'::json; -- ERROR
ERROR: invalid input syntax for type json
LINE 1: SELECT '1.3ex100'::json;
^
DETAIL: Token "1.3ex100" is invalid.
CONTEXT: JSON data, line 1: 1.3ex100
-- Arrays.
SELECT '[]'::json; -- OK
json
------
[]
(1 row)
SELECT '[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]'::json; -- OK
json
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
(1 row)
SELECT '[1,2]'::json; -- OK
json
-------
[1,2]
(1 row)
SELECT '[1,2,]'::json; -- ERROR, trailing comma
ERROR: invalid input syntax for type json
LINE 1: SELECT '[1,2,]'::json;
^
DETAIL: Expected JSON value, but found "]".
CONTEXT: JSON data, line 1: [1,2,]
SELECT '[1,2'::json; -- ERROR, no closing bracket
ERROR: invalid input syntax for type json
LINE 1: SELECT '[1,2'::json;
^
DETAIL: The input string ended unexpectedly.
CONTEXT: JSON data, line 1: [1,2
SELECT '[1,[2]'::json; -- ERROR, no closing bracket
ERROR: invalid input syntax for type json
LINE 1: SELECT '[1,[2]'::json;
^
DETAIL: The input string ended unexpectedly.
CONTEXT: JSON data, line 1: [1,[2]
-- Objects.
SELECT '{}'::json; -- OK
json
------
{}
(1 row)
SELECT '{"abc"}'::json; -- ERROR, no value
ERROR: invalid input syntax for type json
LINE 1: SELECT '{"abc"}'::json;
^
DETAIL: Expected ":", but found "}".
CONTEXT: JSON data, line 1: {"abc"}
SELECT '{"abc":1}'::json; -- OK
json
-----------
{"abc":1}
(1 row)
SELECT '{1:"abc"}'::json; -- ERROR, keys must be strings
ERROR: invalid input syntax for type json
LINE 1: SELECT '{1:"abc"}'::json;
^
DETAIL: Expected string or "}", but found "1".
CONTEXT: JSON data, line 1: {1...
SELECT '{"abc",1}'::json; -- ERROR, wrong separator
ERROR: invalid input syntax for type json
LINE 1: SELECT '{"abc",1}'::json;
^
DETAIL: Expected ":", but found ",".
CONTEXT: JSON data, line 1: {"abc",...
SELECT '{"abc"=1}'::json; -- ERROR, totally wrong separator
ERROR: invalid input syntax for type json
LINE 1: SELECT '{"abc"=1}'::json;
^
DETAIL: Token "=" is invalid.
CONTEXT: JSON data, line 1: {"abc"=...
SELECT '{"abc"::1}'::json; -- ERROR, another wrong separator
ERROR: invalid input syntax for type json
LINE 1: SELECT '{"abc"::1}'::json;
^
DETAIL: Expected JSON value, but found ":".
CONTEXT: JSON data, line 1: {"abc"::...
SELECT '{"abc":1,"def":2,"ghi":[3,4],"hij":{"klm":5,"nop":[6]}}'::json; -- OK
json
---------------------------------------------------------
{"abc":1,"def":2,"ghi":[3,4],"hij":{"klm":5,"nop":[6]}}
(1 row)
SELECT '{"abc":1:2}'::json; -- ERROR, colon in wrong spot
ERROR: invalid input syntax for type json
LINE 1: SELECT '{"abc":1:2}'::json;
^
DETAIL: Expected "," or "}", but found ":".
CONTEXT: JSON data, line 1: {"abc":1:...
SELECT '{"abc":1,3}'::json; -- ERROR, no value
ERROR: invalid input syntax for type json
LINE 1: SELECT '{"abc":1,3}'::json;
^
DETAIL: Expected string, but found "3".
CONTEXT: JSON data, line 1: {"abc":1,3...
-- Miscellaneous stuff.
SELECT 'true'::json; -- OK
json
------
true
(1 row)
SELECT 'false'::json; -- OK
json
-------
false
(1 row)
SELECT 'null'::json; -- OK
json
------
null
(1 row)
SELECT ' true '::json; -- OK, even with extra whitespace
json
--------
true
(1 row)
SELECT 'true false'::json; -- ERROR, too many values
ERROR: invalid input syntax for type json
LINE 1: SELECT 'true false'::json;
^
DETAIL: Expected end of input, but found "false".
CONTEXT: JSON data, line 1: true false
SELECT 'true, false'::json; -- ERROR, too many values
ERROR: invalid input syntax for type json
LINE 1: SELECT 'true, false'::json;
^
DETAIL: Expected end of input, but found ",".
CONTEXT: JSON data, line 1: true,...
SELECT 'truf'::json; -- ERROR, not a keyword
ERROR: invalid input syntax for type json
LINE 1: SELECT 'truf'::json;
^
DETAIL: Token "truf" is invalid.
CONTEXT: JSON data, line 1: truf
SELECT 'trues'::json; -- ERROR, not a keyword
ERROR: invalid input syntax for type json
LINE 1: SELECT 'trues'::json;
^
DETAIL: Token "trues" is invalid.
CONTEXT: JSON data, line 1: trues
SELECT ''::json; -- ERROR, no value
ERROR: invalid input syntax for type json
LINE 1: SELECT ''::json;
^
DETAIL: The input string ended unexpectedly.
CONTEXT: JSON data, line 1:
SELECT ' '::json; -- ERROR, no value
ERROR: invalid input syntax for type json
LINE 1: SELECT ' '::json;
^
DETAIL: The input string ended unexpectedly.
CONTEXT: JSON data, line 1:
--constructors
-- array_to_json
SELECT array_to_json(array(select 1 as a));
array_to_json
---------------
[1]
(1 row)
SELECT array_to_json(array_agg(q),false) from (select x as b, x * 2 as c from generate_series(1,3) x) q;
array_to_json
---------------------------------------------
[{"b":1,"c":2},{"b":2,"c":4},{"b":3,"c":6}]
(1 row)
SELECT array_to_json(array_agg(q),true) from (select x as b, x * 2 as c from generate_series(1,3) x) q;
array_to_json
-----------------
[{"b":1,"c":2},+
{"b":2,"c":4},+
{"b":3,"c":6}]
(1 row)
SELECT array_to_json(array_agg(q),false)
FROM ( SELECT $$a$$ || x AS b, y AS c,
ARRAY[ROW(x.*,ARRAY[1,2,3]),
ROW(y.*,ARRAY[4,5,6])] AS z
FROM generate_series(1,2) x,
generate_series(4,5) y) q;
array_to_json
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
[{"b":"a1","c":4,"z":[{"f1":1,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]},{"b":"a1","c":5,"z":[{"f1":1,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]},{"b":"a2","c":4,"z":[{"f1":2,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]},{"b":"a2","c":5,"z":[{"f1":2,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}]
(1 row)
SELECT array_to_json(array_agg(x),false) from generate_series(5,10) x;
array_to_json
----------------
[5,6,7,8,9,10]
(1 row)
SELECT array_to_json('{{1,5},{99,100}}'::int[]);
array_to_json
------------------
[[1,5],[99,100]]
(1 row)
-- row_to_json
SELECT row_to_json(row(1,'foo'));
row_to_json
---------------------
{"f1":1,"f2":"foo"}
(1 row)
SELECT row_to_json(q)
FROM (SELECT $$a$$ || x AS b,
y AS c,
ARRAY[ROW(x.*,ARRAY[1,2,3]),
ROW(y.*,ARRAY[4,5,6])] AS z
FROM generate_series(1,2) x,
generate_series(4,5) y) q;
row_to_json
--------------------------------------------------------------------
{"b":"a1","c":4,"z":[{"f1":1,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
{"b":"a1","c":5,"z":[{"f1":1,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
{"b":"a2","c":4,"z":[{"f1":2,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
{"b":"a2","c":5,"z":[{"f1":2,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
(4 rows)
SELECT row_to_json(q,true)
FROM (SELECT $$a$$ || x AS b,
y AS c,
ARRAY[ROW(x.*,ARRAY[1,2,3]),
ROW(y.*,ARRAY[4,5,6])] AS z
FROM generate_series(1,2) x,
generate_series(4,5) y) q;
row_to_json
-----------------------------------------------------
{"b":"a1", +
"c":4, +
"z":[{"f1":1,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
{"b":"a1", +
"c":5, +
"z":[{"f1":1,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
{"b":"a2", +
"c":4, +
"z":[{"f1":2,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]}
{"b":"a2", +
"c":5, +
"z":[{"f1":2,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}
(4 rows)
CREATE TEMP TABLE rows AS
SELECT x, 'txt' || x as y
FROM generate_series(1,3) AS x;
SELECT row_to_json(q,true)
FROM rows q;
row_to_json
--------------
{"x":1, +
"y":"txt1"}
{"x":2, +
"y":"txt2"}
{"x":3, +
"y":"txt3"}
(3 rows)
SELECT row_to_json(row((select array_agg(x) as d from generate_series(5,10) x)),false);
row_to_json
-----------------------
{"f1":[5,6,7,8,9,10]}
(1 row)
-- non-numeric output
SELECT row_to_json(q)
FROM (SELECT 'NaN'::float8 AS "float8field") q;
row_to_json
-----------------------
{"float8field":"NaN"}
(1 row)
SELECT row_to_json(q)
FROM (SELECT 'Infinity'::float8 AS "float8field") q;
row_to_json
----------------------------
{"float8field":"Infinity"}
(1 row)
SELECT row_to_json(q)
FROM (SELECT '-Infinity'::float8 AS "float8field") q;
row_to_json
-----------------------------
{"float8field":"-Infinity"}
(1 row)
-- json input
SELECT row_to_json(q)
FROM (SELECT '{"a":1,"b": [2,3,4,"d","e","f"],"c":{"p":1,"q":2}}'::json AS "jsonfield") q;
row_to_json
------------------------------------------------------------------
{"jsonfield":{"a":1,"b": [2,3,4,"d","e","f"],"c":{"p":1,"q":2}}}
(1 row)
|
