The Ultimate Guide to High Availability with MariaDB

Differences between JSON_QUERY and JSON_VALUE

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MariaDB starting with 10.2.3

JSON functions were added in MariaDB 10.2.3.

The primary difference between the two functions is that JSON_QUERY returns a scalar, and JSON_VALUE returns an object or an array.

Take the following JSON document as an example

SET @json='{ "x": [0,1], "y": "[0,1]", "z": "Monty" }';

Note that data member "x" is an array, and data members "y" and "z" are strings.

SELECT JSON_QUERY(@json,'$'), JSON_VALUE(@json,'$');
+--------------------------------------------+-----------------------+
| JSON_QUERY(@json,'$')                      | JSON_VALUE(@json,'$') |
+--------------------------------------------+-----------------------+
| { "x": [0,1], "y": "[0,1]", "z": "Monty" } | NULL                  |
+--------------------------------------------+-----------------------+

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