JSON_OBJECT

Description

Generate a json object containing the specified Key-Value, an exception error is returned when Key is NULL or the number of parameters are odd.

Syntax

JSON_OBJECT (<key>, <value>[,<key>, <value>, ...])

Parameters

Parameter	Description
<key>	The Key value in the Key-Value of the generated json object.
<value>	The Value value in the Key-Value of the generated json object.

Return Values

Return a json object. Special cases are as follows:

• If no parameters are passed, return an empty json object.
• If the number of parameters passed is odd, return an exception error.
• If the passed Key is NULL, return an exception error.
• If the passed Value is NULL, the Value value of the Key-Value pair in the returned json object is NULL.

Examples

select json_object();

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

select json_object('time',curtime());

+--------------------------------+
| json_object('time', curtime()) |
+--------------------------------+
| {"time": "10:49:18"}           |
+--------------------------------+

SELECT json_object('id', 87, 'name', 'carrot');

+-----------------------------------------+
| json_object('id', 87, 'name', 'carrot') |
+-----------------------------------------+
| {"id": 87, "name": "carrot"}            |
+-----------------------------------------+

select json_object('username',null);

+---------------------------------+
| json_object('username', 'NULL') |
+---------------------------------+
| {"username": NULL}              |
+---------------------------------+

select json_object(null,null);

ERROR 1105 (HY000): errCode = 2, detailMessage = json_object key can't be NULL: json_object(NULL)