How to process json string as stored procedure parameter - mysql

Question

I need to receive a json string as a parameter of the procedure and parse it as a json object.
An example of this json string: {'new_settings': [{'setting_name': 'test', 'setting_value': 'test_value'}]}
I need to fetch the array property named "new_settings" and iterate through the objects inside this array.
This is what i have at the moment:
CREATE PROCEDURE `sp_test` (IN `_settings` longtext)
BEGIN
DECLARE i INT UNSIGNED DEFAULT 0;
DECLARE count INT UNSIGNED DEFAULT 0;
DECLARE current_item LONGTEXT;
START TRANSACTION;
SET count = (JSON_LENGTH(JSON_EXTRACT(_settings, '$.new_settings')) - 1);
WHILE i < count DO
SET current_item := (_settings, CONCAT('$[', i, ']'));
INSERT INTO settings(setting_name, setting_value) VALUES (JSON_EXTRACT(current_item, '$.setting_name'), JSON_EXTRACT(current_item, '$.setting_value'));
SET i := i + 1;
END WHILE;
COMMIT;
END
But i am getting the following error: "Syntax error in JSON text in argument 1 to function 'json_extract' at position 3" and i dont understand what is wrong.
Can you provide some insight?
Thank you in advance.

Answer 1

Your json is all wrong.
You always should check with json Validators, if mysql can read your input.
SET #a = '{"new_settings": [{"setting_name": "test", "setting_value": "test_value"}]}';
SELECT JSON_EXTRACT(#a, '$.new_settings[0].setting_name') c1
, JSON_EXTRACT(#a, '$.new_settings[0].setting_value') c2;
Would give you
c1 c2
test test_value
Where did you get your json String?