--- json_object_keys ---
SELECT json_object_keys(parse_json('{"a": 1, "b": {"c": 2}}'));

+---------------------------------------------------------------+
| json_object_keys(parse_json(Utf8("{"a": 1, "b": {"c": 2}}"))) |
+---------------------------------------------------------------+
| [a, b]                                                        |
+---------------------------------------------------------------+

SELECT json_object_keys(parse_json('{}'));

+------------------------------------------+
| json_object_keys(parse_json(Utf8("{}"))) |
+------------------------------------------+
| []                                       |
+------------------------------------------+

SELECT json_object_keys(parse_json('[1, 2]'));

+----------------------------------------------+
| json_object_keys(parse_json(Utf8("[1, 2]"))) |
+----------------------------------------------+
|                                              |
+----------------------------------------------+

SELECT json_object_keys(parse_json('null'));

+--------------------------------------------+
| json_object_keys(parse_json(Utf8("null"))) |
+--------------------------------------------+
|                                            |
+--------------------------------------------+

SELECT json_object_keys(NULL);

+------------------------+
| json_object_keys(NULL) |
+------------------------+
|                        |
+------------------------+

--- json_path_exists ---
SELECT json_path_exists(parse_json('{"a": 1, "b": 2}'), '$.a');

+--------------------------------------------------------------------+
| json_path_exists(parse_json(Utf8("{"a": 1, "b": 2}")),Utf8("$.a")) |
+--------------------------------------------------------------------+
| true                                                               |
+--------------------------------------------------------------------+

SELECT json_path_exists(parse_json('{"a": 1, "b": 2}'), '$.c');

+--------------------------------------------------------------------+
| json_path_exists(parse_json(Utf8("{"a": 1, "b": 2}")),Utf8("$.c")) |
+--------------------------------------------------------------------+
| false                                                              |
+--------------------------------------------------------------------+

SELECT json_path_exists(parse_json('[1, 2]'), '[0]');

+----------------------------------------------------------+
| json_path_exists(parse_json(Utf8("[1, 2]")),Utf8("[0]")) |
+----------------------------------------------------------+
| true                                                     |
+----------------------------------------------------------+

SELECT json_path_exists(parse_json('[1, 2]'), '[2]');

+----------------------------------------------------------+
| json_path_exists(parse_json(Utf8("[1, 2]")),Utf8("[2]")) |
+----------------------------------------------------------+
| false                                                    |
+----------------------------------------------------------+

SELECT json_path_exists(parse_json('[1, 2]'), 'null');

+-----------------------------------------------------------+
| json_path_exists(parse_json(Utf8("[1, 2]")),Utf8("null")) |
+-----------------------------------------------------------+
| false                                                     |
+-----------------------------------------------------------+

SELECT json_path_exists(parse_json('null'), '$.a');

+--------------------------------------------------------+
| json_path_exists(parse_json(Utf8("null")),Utf8("$.a")) |
+--------------------------------------------------------+
| false                                                  |
+--------------------------------------------------------+

SELECT json_path_exists(NULL, '$.a');

+------------------------------------+
| json_path_exists(NULL,Utf8("$.a")) |
+------------------------------------+
|                                    |
+------------------------------------+

SELECT json_path_exists(parse_json('{}'), NULL);

+-----------------------------------------------+
| json_path_exists(parse_json(Utf8("{}")),NULL) |
+-----------------------------------------------+
|                                               |
+-----------------------------------------------+

--- json_path_match ---
SELECT json_path_match(parse_json('{"a": 1, "b": 2}'), '$.a == 1');

+------------------------------------------------------------------------+
| json_path_match(parse_json(Utf8("{"a": 1, "b": 2}")),Utf8("$.a == 1")) |
+------------------------------------------------------------------------+
| true                                                                   |
+------------------------------------------------------------------------+

SELECT json_path_match(parse_json('{"a":1,"b":[1,2,3]}'), '$.b[0] > 1');

+-----------------------------------------------------------------------------+
| json_path_match(parse_json(Utf8("{"a":1,"b":[1,2,3]}")),Utf8("$.b[0] > 1")) |
+-----------------------------------------------------------------------------+
| false                                                                       |
+-----------------------------------------------------------------------------+

SELECT json_path_match(parse_json('{"a":1,"b":[1,2,3]}'), '$.b[1 to last] >= 2');

+--------------------------------------------------------------------------------------+
| json_path_match(parse_json(Utf8("{"a":1,"b":[1,2,3]}")),Utf8("$.b[1 to last] >= 2")) |
+--------------------------------------------------------------------------------------+
| true                                                                                 |
+--------------------------------------------------------------------------------------+

SELECT json_path_match(parse_json('{"a":1,"b":[1,2,3]}'), 'null');

+-----------------------------------------------------------------------+
| json_path_match(parse_json(Utf8("{"a":1,"b":[1,2,3]}")),Utf8("null")) |
+-----------------------------------------------------------------------+
|                                                                       |
+-----------------------------------------------------------------------+

SELECT json_path_match(parse_json('null'), '$.a == 1');

+------------------------------------------------------------+
| json_path_match(parse_json(Utf8("null")),Utf8("$.a == 1")) |
+------------------------------------------------------------+
|                                                            |
+------------------------------------------------------------+

--- json_object ---
SELECT json_to_string(json_object('a', 1, 'b', 'text', 'c', true, 'd', 1.5));

+-----------------------------------------------------------------------------------------------------------------------+
| json_to_string(json_object(Utf8("a"),Int64(1),Utf8("b"),Utf8("text"),Utf8("c"),Boolean(true),Utf8("d"),Float64(1.5))) |
+-----------------------------------------------------------------------------------------------------------------------+
| {"a":1,"b":"text","c":true,"d":1.5}                                                                                   |
+-----------------------------------------------------------------------------------------------------------------------+

SELECT json_to_string(json_object());

+-------------------------------+
| json_to_string(json_object()) |
+-------------------------------+
| {}                            |
+-------------------------------+

SELECT json_to_string(json_object('nul', NULL));

+-----------------------------------------------+
| json_to_string(json_object(Utf8("nul"),NULL)) |
+-----------------------------------------------+
| {"nul":null}                                  |
+-----------------------------------------------+

SELECT json_to_string(json_object('nl', concat('line1', chr(10), 'line2'), 'q', 'quote"back\slash'));

+-------------------------------------------------------------------------------------------------------------------------------+
| json_to_string(json_object(Utf8("nl"),concat(Utf8("line1"),chr(Int64(10)),Utf8("line2")),Utf8("q"),Utf8("quote"back\slash"))) |
+-------------------------------------------------------------------------------------------------------------------------------+
| {"nl":"line1\nline2","q":"quote\"back\\slash"}                                                                                |
+-------------------------------------------------------------------------------------------------------------------------------+

SELECT json_object('a');

Error: 3001(EngineExecuteQuery), Execution error: json_object expects (key, value) argument pairs, got 1 arguments

SELECT json_object(NULL, 1);

Error: 3001(EngineExecuteQuery), Execution error: json_object does not allow NULL keys

SELECT json_object('ts', to_timestamp(0));

Error: 3001(EngineExecuteQuery), Execution error: json_object does not support values of type Timestamp(ns); cast the value to a string

SELECT json_object('price', CAST('12.34' AS DECIMAL(10, 2)));

Error: 3001(EngineExecuteQuery), Execution error: json_object does not support values of type Decimal128(10, 2); cast the value to a string

CREATE TABLE json_object_src (ts TIMESTAMP TIME INDEX, host STRING, pid BIGINT);

Affected Rows: 0

INSERT INTO json_object_src VALUES (0, 'h1', 42), (1, NULL, 7);

Affected Rows: 2

SELECT json_to_string(json_object('host', host, 'pid', pid)) FROM json_object_src ORDER BY ts;

+------------------------------------------------------------------------------------------------+
| json_to_string(json_object(Utf8("host"),json_object_src.host,Utf8("pid"),json_object_src.pid)) |
+------------------------------------------------------------------------------------------------+
| {"host":"h1","pid":42}                                                                         |
| {"host":null,"pid":7}                                                                          |
+------------------------------------------------------------------------------------------------+

DROP TABLE json_object_src;

Affected Rows: 0