mysql> SET @j = '["a", ["b", "c"], "d"]'; mysql> SELECT JSON_ARRAY_APPEND(@j, '$[1]', 1); +----------------------------------+ | JSON_ARRAY_APPEND(@j, '$[1]', 1) | +----------------------------------+ | ["a", ["b", "c", 1], "d"] | +----------------------------------+ mysql> SELECT JSON_ARRAY_APPEND(@j, '$[0]', 2); +----------------------------------+ | JSON_ARRAY_APPEND(@j, '$[0]', 2) | +----------------------------------+ | [["a", 2], ["b", "c"], "d"] | +----------------------------------+ mysql> SELECT JSON_ARRAY_APPEND(@j, '$[1][0]', 3); +-------------------------------------+ | JSON_ARRAY_APPEND(@j, '$[1][0]', 3) | +-------------------------------------+ | ["a", [["b", 3], "c"], "d"] | +-------------------------------------+ mysql> SET @j = '{"a": 1, "b": [2, 3], "c": 4}'; mysql> SELECT JSON_ARRAY_APPEND(@j, '$.b', 'x'); +------------------------------------+ | JSON_ARRAY_APPEND(@j, '$.b', 'x') | +------------------------------------+ | {"a": 1, "b": [2, 3, "x"], "c": 4} | +------------------------------------+ mysql> SELECT JSON_ARRAY_APPEND(@j, '$.c', 'y'); +--------------------------------------+ | JSON_ARRAY_APPEND(@j, '$.c', 'y') | +--------------------------------------+ | {"a": 1, "b": [2, 3], "c": [4, "y"]} | +--------------------------------------+ mysql> SET @j = '{"a": 1}'; mysql> SELECT JSON_ARRAY_APPEND(@j, '$', 'z'); +---------------------------------+ | JSON_ARRAY_APPEND(@j, '$', 'z') | +---------------------------------+ | [{"a": 1}, "z"] | +---------------------------------+

 

3.3.2 JSON_ARRAY_INSERT

JSON_ARRAY_INSERT(json_doc, path, val[, path, val] ...)

 在path指定的json array元素插入val，原位置及以右的元素顺次右移。如果path指定的数据非json array元素，则略过此val；如果指定的元素下标超过json array的长度，则插入尾部。

　　

mysql> SET @j = '["a", {"b": [1, 2]}, [3, 4]]'; mysql> SELECT JSON_ARRAY_INSERT(@j, '$[1]', 'x'); +------------------------------------+ | JSON_ARRAY_INSERT(@j, '$[1]', 'x') | +------------------------------------+ | ["a", "x", {"b": [1, 2]}, [3, 4]] | +------------------------------------+ mysql> SELECT JSON_ARRAY_INSERT(@j, '$[100]', 'x'); +--------------------------------------+ | JSON_ARRAY_INSERT(@j, '$[100]', 'x') | +--------------------------------------+ | ["a", {"b": [1, 2]}, [3, 4], "x"] | +--------------------------------------+ mysql> SELECT JSON_ARRAY_INSERT(@j, '$[1].b[0]', 'x'); +-----------------------------------------+ | JSON_ARRAY_INSERT(@j, '$[1].b[0]', 'x') | +-----------------------------------------+ | ["a", {"b": ["x", 1, 2]}, [3, 4]] | +-----------------------------------------+ mysql> SELECT JSON_ARRAY_INSERT(@j, '$[2][1]', 'y'); +---------------------------------------+ | JSON_ARRAY_INSERT(@j, '$[2][1]', 'y') | +---------------------------------------+ | ["a", {"b": [1, 2]}, [3, "y", 4]] | +---------------------------------------+ mysql> SELECT JSON_ARRAY_INSERT(@j, '$[0]', 'x', '$[2][1]', 'y'); +----------------------------------------------------+ | JSON_ARRAY_INSERT(@j, '$[0]', 'x', '$[2][1]', 'y') | +----------------------------------------------------+ | ["x", "a", {"b": [1, 2]}, [3, 4]] | +----------------------------------------------------+

3.3.3 JSON_INSERT/JSON_REPLACE/JSON_SET

JSON_INSERT(json_doc, path, val[, path, val] ...)

在指定path下插入数据，如果path已存在，则忽略此val（不存在才插入）。

mysql> SET @j = '{ "a": 1, "b": [2, 3]}'; mysql> SELECT JSON_INSERT(@j, '$.a', 10, '$.c', '[true, false]'); +----------------------------------------------------+ | JSON_INSERT(@j, '$.a', 10, '$.c', '[true, false]') | +----------------------------------------------------+ | {"a": 1, "b": [2, 3], "c": "[true, false]"} | +----------------------------------------------------+

JSON_REPLACE(json_doc, path, val[, path, val] ...)

替换指定路径的数据，如果某个路径不存在则略过（存在才替换）。如果有参数为NULL，则返回NULL。