JSON_KEYS(json_doc[, path])


Returns the keys as a JSON array from the top-level value of a JSON object or, if the optional path argument is provided, the top-level keys from the path.

Excludes keys from nested sub-objects in the top level value. The resulting array will be empty if the selected object is empty.

Returns NULL if any of the arguments are null, a given path does not locate an object, or if the json_doc argument is not an object.

An error will occur if JSON document is invalid, the path is invalid or if the path contains a * or ** wildcard.


SELECT JSON_KEYS('{"A": 1, "B": {"C": 2}}');
| JSON_KEYS('{"A": 1, "B": {"C": 2}}') |
| ["A", "B"]                           |

SELECT JSON_KEYS('{"A": 1, "B": 2, "C": {"D": 3}}', '$.C');
| JSON_KEYS('{"A": 1, "B": 2, "C": {"D": 3}}', '$.C') |
| ["D"]                                               |


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