MySQL json_search on numeric values

Question

I've got a json list of objects like that

[{
    "something": "bla",
    "id": 2
}, {
    "something": "yes",
    "id": 1
}]

My id field is always a numeric value. But when I try to find id = 2, MySQL returns NULL

select
    json_search(
        json_extract(
            '[{"something": "bla" ,"id": 2}, {"something": "yes","id": 1}]',
            "$[*].id"
        ),
        'one',
        2
    ) as json_search;

json_search |
------------|
            |

When I use a string as value in my json id object instead of a numeric value, I got a result with Index 0.

select
    json_search(
        json_extract(
            '[{"something": "bla" ,"id": "2"}, {"something": "yes","id": 1}]',
            "$[*].id"
        ),
        'one',
        "2"
    ) as json_search;

json_search |
------------|
"$[0]"      |

I'm using MySQL 5.7.17

@@version  |
-----------|
5.7.17-log |

Is numeric search in json arrays not provided in MySQL?

Answer 1

You can try something complicated, not intuitive and possibly with performance problems, but it's an option:

mysql> SELECT JSON_SEARCH(
    ->   REPLACE(
    ->     REPLACE(
    ->       REPLACE(
    ->         JSON_EXTRACT('[
    '>                         {"something": "bla" ,"id": 2},
    '>                         {"something": "yes","id": 1}
    '>                       ]', "$[*].id"),
    ->       ', ', '","'),
    ->     '[', '["'),
    ->   ']', '"]'),
    -> 'one', '2') `json_search`;
+-------------+
| json_search |
+-------------+
| "$[0]"      |
+-------------+
1 row in set (0.00 sec)