mysql 从数组中提取json元素 [英] mysql Extract json element from array

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我需要通过索引提取 JSON 元素，例如

I need to extract JSON element by index e.g.

SELECT JSON_EXTRACT('[{"featureId":"a","read":1,"write":1,"delete":1},{"featureId":"2","read":1,"write":0,"delete":1}]', '$[0].*');

但它只是提取了我想要提取的部分的值，如下所示:

But it just extracts the values I want extracted part to be like this:

{
    "featureId": "a",
    "read": 1,
    "write": 1,
    "delete": 1
}

尝试:

SELECT JSON_EXTRACT('
  [
    {"featureId":"a","read":1,"write":1,"delete":1},
    {"featureId":"2","read":1,"write":0,"delete":1}
  ]
', '$[0]');

请参阅 db-fiddle.

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