Một lựa chọn:
DROP PROCEDURE IF EXISTS `sp_update_json`;
DELIMITER //
CREATE PROCEDURE `sp_update_json`(
`json` JSON,
`value` VARCHAR(255)
)
BEGIN
DECLARE `array_objects` JSON DEFAULT
REPLACE(JSON_SEARCH(`json`,
'all',
'loud',
NULL,
'$.parrot[*].volume'
), 'volume', 'says');
DECLARE `max_objects` INT UNSIGNED DEFAULT
JSON_LENGTH(`array_objects`);
DECLARE `current_object` INT UNSIGNED DEFAULT 0;
WHILE `current_object` < `max_objects` DO
SET `json` := JSON_REPLACE(`json`,
JSON_UNQUOTE(
JSON_EXTRACT(
`array_objects`,
CONCAT('$[', `current_object`, ']')
)
), `value`);
SET `current_object` := `current_object` + 1;
END WHILE;
SELECT `json`;
END//
DELIMITER ;
SET @`j` := '
{
"cat": "meow",
"dog": "woof",
"parrot": [
{"volume": "quiet", "says": "hello"},
{"volume": "loud", "says": "polly"},
{"volume": "loud", "says": "cracker"}
]
}';
CALL `sp_update_json`(@`j`, 'pretty bird');
Xem db-fiddle .