--- /dev/null
+-- 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)
+
+--json_agg
+SELECT json_agg(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;
+ json_agg
+-----------------------------------------------------------------------
+ [{"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 json_agg(q)
+ FROM rows q;
+ json_agg
+-----------------------
+ [{"x":1,"y":"txt1"}, +
+ {"x":2,"y":"txt2"}, +
+ {"x":3,"y":"txt3"}]
+(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)
+
+-- json extraction functions
+CREATE TEMP TABLE test_json (
+ json_type text,
+ test_json json
+);
+INSERT INTO test_json VALUES
+('scalar','"a scalar"'),
+('array','["zero", "one","two",null,"four","five"]'),
+('object','{"field1":"val1","field2":"val2","field3":null}');
+SELECT test_json -> 'x'
+FROM test_json
+WHERE json_type = 'scalar';
+ERROR: cannot extract element from a scalar
+SELECT test_json -> 'x'
+FROM test_json
+WHERE json_type = 'array';
+ERROR: cannot extract field from a non-object
+SELECT test_json -> 'x'
+FROM test_json
+WHERE json_type = 'object';
+ ?column?
+----------
+
+(1 row)
+
+SELECT test_json->'field2'
+FROM test_json
+WHERE json_type = 'object';
+ ?column?
+----------
+ "val2"
+(1 row)
+
+SELECT test_json->>'field2'
+FROM test_json
+WHERE json_type = 'object';
+ ?column?
+----------
+ val2
+(1 row)
+
+SELECT test_json -> 2
+FROM test_json
+WHERE json_type = 'scalar';
+ERROR: cannot extract element from a scalar
+SELECT test_json -> 2
+FROM test_json
+WHERE json_type = 'array';
+ ?column?
+----------
+ "two"
+(1 row)
+
+SELECT test_json -> 2
+FROM test_json
+WHERE json_type = 'object';
+ERROR: cannot extract array element from a non-array
+SELECT test_json->>2
+FROM test_json
+WHERE json_type = 'array';
+ ?column?
+----------
+ two
+(1 row)
+
+SELECT json_object_keys(test_json)
+FROM test_json
+WHERE json_type = 'scalar';
+ERROR: cannot call json_object_keys on a scalar
+SELECT json_object_keys(test_json)
+FROM test_json
+WHERE json_type = 'array';
+ERROR: cannot call json_object_keys on an array
+SELECT json_object_keys(test_json)
+FROM test_json
+WHERE json_type = 'object';
+ json_object_keys
+------------------
+ field1
+ field2
+ field3
+(3 rows)
+
+-- nulls
+select (test_json->'field3') is null as expect_false
+from test_json
+where json_type = 'object';
+ expect_false
+--------------
+ f
+(1 row)
+
+select (test_json->>'field3') is null as expect_true
+from test_json
+where json_type = 'object';
+ expect_true
+-------------
+ t
+(1 row)
+
+select (test_json->3) is null as expect_false
+from test_json
+where json_type = 'array';
+ expect_false
+--------------
+ f
+(1 row)
+
+select (test_json->>3) is null as expect_true
+from test_json
+where json_type = 'array';
+ expect_true
+-------------
+ t
+(1 row)
+
+-- array length
+SELECT json_array_length('[1,2,3,{"f1":1,"f2":[5,6]},4]');
+ json_array_length
+-------------------
+ 5
+(1 row)
+
+SELECT json_array_length('[]');
+ json_array_length
+-------------------
+ 0
+(1 row)
+
+SELECT json_array_length('{"f1":1,"f2":[5,6]}');
+ERROR: cannot get array length of a non-array
+SELECT json_array_length('4');
+ERROR: cannot get array length of a scalar
+-- each
+select json_each('{"f1":[1,2,3],"f2":{"f3":1},"f4":null}');
+ json_each
+-------------------
+ (f1,"[1,2,3]")
+ (f2,"{""f3"":1}")
+ (f4,null)
+(3 rows)
+
+select * from json_each('{"f1":[1,2,3],"f2":{"f3":1},"f4":null,"f5":99,"f6":"stringy"}') q;
+ key | value
+-----+-----------
+ f1 | [1,2,3]
+ f2 | {"f3":1}
+ f4 | null
+ f5 | 99
+ f6 | "stringy"
+(5 rows)
+
+select json_each_text('{"f1":[1,2,3],"f2":{"f3":1},"f4":null,"f5":"null"}');
+ json_each_text
+-------------------
+ (f1,"[1,2,3]")
+ (f2,"{""f3"":1}")
+ (f4,)
+ (f5,null)
+(4 rows)
+
+select * from json_each_text('{"f1":[1,2,3],"f2":{"f3":1},"f4":null,"f5":99,"f6":"stringy"}') q;
+ key | value
+-----+----------
+ f1 | [1,2,3]
+ f2 | {"f3":1}
+ f4 |
+ f5 | 99
+ f6 | stringy
+(5 rows)
+
+-- extract_path, extract_path_as_text
+select json_extract_path('{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}','f4','f6');
+ json_extract_path
+-------------------
+ "stringy"
+(1 row)
+
+select json_extract_path('{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}','f2');
+ json_extract_path
+-------------------
+ {"f3":1}
+(1 row)
+
+select json_extract_path('{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}','f2',0::text);
+ json_extract_path
+-------------------
+ "f3"
+(1 row)
+
+select json_extract_path('{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}','f2',1::text);
+ json_extract_path
+-------------------
+ 1
+(1 row)
+
+select json_extract_path_text('{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}','f4','f6');
+ json_extract_path_text
+------------------------
+ stringy
+(1 row)
+
+select json_extract_path_text('{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}','f2');
+ json_extract_path_text
+------------------------
+ {"f3":1}
+(1 row)
+
+select json_extract_path_text('{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}','f2',0::text);
+ json_extract_path_text
+------------------------
+ f3
+(1 row)
+
+select json_extract_path_text('{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}','f2',1::text);
+ json_extract_path_text
+------------------------
+ 1
+(1 row)
+
+-- extract_path nulls
+select json_extract_path('{"f2":{"f3":1},"f4":{"f5":null,"f6":"stringy"}}','f4','f5') is null as expect_false;
+ expect_false
+--------------
+ f
+(1 row)
+
+select json_extract_path_text('{"f2":{"f3":1},"f4":{"f5":null,"f6":"stringy"}}','f4','f5') is null as expect_true;
+ expect_true
+-------------
+ t
+(1 row)
+
+select json_extract_path('{"f2":{"f3":1},"f4":[0,1,2,null]}','f4','3') is null as expect_false;
+ expect_false
+--------------
+ f
+(1 row)
+
+select json_extract_path_text('{"f2":{"f3":1},"f4":[0,1,2,null]}','f4','3') is null as expect_true;
+ expect_true
+-------------
+ t
+(1 row)
+
+-- extract_path operators
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>array['f4','f6'];
+ ?column?
+-----------
+ "stringy"
+(1 row)
+
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>array['f2'];
+ ?column?
+----------
+ {"f3":1}
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>array['f2','0'];
+ ?column?
+----------
+ "f3"
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>array['f2','1'];
+ ?column?
+----------
+ 1
+(1 row)
+
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>>array['f4','f6'];
+ ?column?
+----------
+ stringy
+(1 row)
+
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>>array['f2'];
+ ?column?
+----------
+ {"f3":1}
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>>array['f2','0'];
+ ?column?
+----------
+ f3
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>>array['f2','1'];
+ ?column?
+----------
+ 1
+(1 row)
+
+-- same using array literals
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>'{f4,f6}';
+ ?column?
+-----------
+ "stringy"
+(1 row)
+
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>'{f2}';
+ ?column?
+----------
+ {"f3":1}
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>'{f2,0}';
+ ?column?
+----------
+ "f3"
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>'{f2,1}';
+ ?column?
+----------
+ 1
+(1 row)
+
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>>'{f4,f6}';
+ ?column?
+----------
+ stringy
+(1 row)
+
+select '{"f2":{"f3":1},"f4":{"f5":99,"f6":"stringy"}}'::json#>>'{f2}';
+ ?column?
+----------
+ {"f3":1}
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>>'{f2,0}';
+ ?column?
+----------
+ f3
+(1 row)
+
+select '{"f2":["f3",1],"f4":{"f5":99,"f6":"stringy"}}'::json#>>'{f2,1}';
+ ?column?
+----------
+ 1
+(1 row)
+
+-- array_elements
+select json_array_elements('[1,true,[1,[2,3]],null,{"f1":1,"f2":[7,8,9]},false]');
+ json_array_elements
+-----------------------
+ 1
+ true
+ [1,[2,3]]
+ null
+ {"f1":1,"f2":[7,8,9]}
+ false
+(6 rows)
+
+select * from json_array_elements('[1,true,[1,[2,3]],null,{"f1":1,"f2":[7,8,9]},false]') q;
+ value
+-----------------------
+ 1
+ true
+ [1,[2,3]]
+ null
+ {"f1":1,"f2":[7,8,9]}
+ false
+(6 rows)
+
+-- populate_record
+create type jpop as (a text, b int, c timestamp);
+select * from json_populate_record(null::jpop,'{"a":"blurfl","x":43.2}') q;
+ a | b | c
+--------+---+---
+ blurfl | |
+(1 row)
+
+select * from json_populate_record(row('x',3,'2012-12-31 15:30:56')::jpop,'{"a":"blurfl","x":43.2}') q;
+ a | b | c
+--------+---+--------------------------
+ blurfl | 3 | Mon Dec 31 15:30:56 2012
+(1 row)
+
+select * from json_populate_record(null::jpop,'{"a":"blurfl","x":43.2}', true) q;
+ a | b | c
+--------+---+---
+ blurfl | |
+(1 row)
+
+select * from json_populate_record(row('x',3,'2012-12-31 15:30:56')::jpop,'{"a":"blurfl","x":43.2}', true) q;
+ a | b | c
+--------+---+--------------------------
+ blurfl | 3 | Mon Dec 31 15:30:56 2012
+(1 row)
+
+select * from json_populate_record(null::jpop,'{"a":[100,200,false],"x":43.2}', true) q;
+ a | b | c
+-----------------+---+---
+ [100,200,false] | |
+(1 row)
+
+select * from json_populate_record(row('x',3,'2012-12-31 15:30:56')::jpop,'{"a":[100,200,false],"x":43.2}', true) q;
+ a | b | c
+-----------------+---+--------------------------
+ [100,200,false] | 3 | Mon Dec 31 15:30:56 2012
+(1 row)
+
+select * from json_populate_record(row('x',3,'2012-12-31 15:30:56')::jpop,'{"c":[100,200,false],"x":43.2}', true) q;
+ERROR: invalid input syntax for type timestamp: "[100,200,false]"
+-- populate_recordset
+select * from json_populate_recordset(null::jpop,'[{"a":"blurfl","x":43.2},{"b":3,"c":"2012-01-20 10:42:53"}]',false) q;
+ a | b | c
+--------+---+--------------------------
+ blurfl | |
+ | 3 | Fri Jan 20 10:42:53 2012
+(2 rows)
+
+select * from json_populate_recordset(row('def',99,null)::jpop,'[{"a":"blurfl","x":43.2},{"b":3,"c":"2012-01-20 10:42:53"}]',false) q;
+ a | b | c
+--------+----+--------------------------
+ blurfl | 99 |
+ def | 3 | Fri Jan 20 10:42:53 2012
+(2 rows)
+
+select * from json_populate_recordset(null::jpop,'[{"a":"blurfl","x":43.2},{"b":3,"c":"2012-01-20 10:42:53"}]',true) q;
+ a | b | c
+--------+---+--------------------------
+ blurfl | |
+ | 3 | Fri Jan 20 10:42:53 2012
+(2 rows)
+
+select * from json_populate_recordset(row('def',99,null)::jpop,'[{"a":"blurfl","x":43.2},{"b":3,"c":"2012-01-20 10:42:53"}]',true) q;
+ a | b | c
+--------+----+--------------------------
+ blurfl | 99 |
+ def | 3 | Fri Jan 20 10:42:53 2012
+(2 rows)
+
+select * from json_populate_recordset(row('def',99,null)::jpop,'[{"a":[100,200,300],"x":43.2},{"a":{"z":true},"b":3,"c":"2012-01-20 10:42:53"}]',true) q;
+ a | b | c
+---------------+----+--------------------------
+ [100,200,300] | 99 |
+ {"z":true} | 3 | Fri Jan 20 10:42:53 2012
+(2 rows)
+
+select * from json_populate_recordset(row('def',99,null)::jpop,'[{"c":[100,200,300],"x":43.2},{"a":{"z":true},"b":3,"c":"2012-01-20 10:42:53"}]',true) q;
+ERROR: invalid input syntax for type timestamp: "[100,200,300]"
+-- using the default use_json_as_text argument
+select * from json_populate_recordset(null::jpop,'[{"a":"blurfl","x":43.2},{"b":3,"c":"2012-01-20 10:42:53"}]') q;
+ a | b | c
+--------+---+--------------------------
+ blurfl | |
+ | 3 | Fri Jan 20 10:42:53 2012
+(2 rows)
+
+select * from json_populate_recordset(row('def',99,null)::jpop,'[{"a":"blurfl","x":43.2},{"b":3,"c":"2012-01-20 10:42:53"}]') q;
+ a | b | c
+--------+----+--------------------------
+ blurfl | 99 |
+ def | 3 | Fri Jan 20 10:42:53 2012
+(2 rows)
+
+select * from json_populate_recordset(row('def',99,null)::jpop,'[{"a":[100,200,300],"x":43.2},{"a":{"z":true},"b":3,"c":"2012-01-20 10:42:53"}]') q;
+ERROR: cannot call json_populate_recordset on a nested object
+select * from json_populate_recordset(row('def',99,null)::jpop,'[{"c":[100,200,300],"x":43.2},{"a":{"z":true},"b":3,"c":"2012-01-20 10:42:53"}]') q;
+ERROR: cannot call json_populate_recordset on a nested object
+-- handling of unicode surrogate pairs
+select json '{ "a": "\ud83d\ude04\ud83d\udc36" }' -> 'a' as correct_in_utf8;
+ERROR: invalid input syntax for type json
+DETAIL: Unicode escape for code points higher than U+007F not permitted in non-UTF8 encoding
+CONTEXT: JSON data, line 1: { "a":...
+select json '{ "a": "\ud83d\ud83d" }' -> 'a'; -- 2 high surrogates in a row
+ERROR: invalid input syntax for type json
+DETAIL: high order surrogate must not follow a high order surrogate.
+CONTEXT: JSON data, line 1: { "a":...
+select json '{ "a": "\ude04\ud83d" }' -> 'a'; -- surrogates in wrong order
+ERROR: invalid input syntax for type json
+DETAIL: low order surrogate must follow a high order surrogate.
+CONTEXT: JSON data, line 1: { "a":...
+select json '{ "a": "\ud83dX" }' -> 'a'; -- orphan high surrogate
+ERROR: invalid input syntax for type json
+DETAIL: low order surrogate must follow a high order surrogate.
+CONTEXT: JSON data, line 1: { "a":...
+select json '{ "a": "\ude04X" }' -> 'a'; -- orphan low surrogate
+ERROR: invalid input syntax for type json
+DETAIL: low order surrogate must follow a high order surrogate.
+CONTEXT: JSON data, line 1: { "a":...
+--handling of simple unicode escapes
+select json '{ "a": "the Copyright \u00a9 sign" }' ->> 'a' as correct_in_utf8;
+ERROR: invalid input syntax for type json
+DETAIL: Unicode escape for code points higher than U+007F not permitted in non-UTF8 encoding
+CONTEXT: JSON data, line 1: { "a":...
+select json '{ "a": "dollar \u0024 character" }' ->> 'a' as correct_everywhere;
+ correct_everywhere
+--------------------
+ dollar $ character
+(1 row)
+
+select json '{ "a": "null \u0000 escape" }' ->> 'a' as not_unescaped;
+ not_unescaped
+--------------------
+ null \u0000 escape
+(1 row)
+
projects / postgresql.git / commitdiff