json-exists-path

---

{ "title": "JSON_EXISTS_PATH", "language": "en" }

Description

It is used to judge whether the field specified by json_path exists in the JSON data. If it exists, it returns TRUE, and if it does not exist, it returns FALSE

Syntax

JSON_EXISTS_PATH (<json_str>,  <path>)

Alias

• JSONB_EXISTS_PATH

Parameters

Parameter	Description
<json_str>	The element to be included in the JSON array. It can be a value of any type, including NULL. If no element is specified, an empty array is returned.
<path>	The JSON path to be judged. If it is NULL, then return NULL.

Return Values

If it exists, return TRUE; if it does not exist, return FALSE.

Examples

SELECT JSON_EXISTS_PATH('{"id": 123, "name": "doris"}', '$.name');

+---------------------------------------------------------------------------+
| jsonb_exists_path(cast('{"id": 123, "name": "doris"}' as JSON), '$.name') |
+---------------------------------------------------------------------------+
|                                                                         1 |
+---------------------------------------------------------------------------+

SELECT JSON_EXISTS_PATH('{"id": 123, "name": "doris"}', '$.age');

+--------------------------------------------------------------------------+
| jsonb_exists_path(cast('{"id": 123, "name": "doris"}' as JSON), '$.age') |
+--------------------------------------------------------------------------+
|                                                                        0 |
+--------------------------------------------------------------------------+

SELECT JSONB_EXISTS_PATH('{"id": 123, "name": "doris"}', '$.age');

+--------------------------------------------------------------------------+
| jsonb_exists_path(cast('{"id": 123, "name": "doris"}' as JSON), '$.age') |
+--------------------------------------------------------------------------+
|                                                                        0 |
+--------------------------------------------------------------------------+