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\"v1\", \"k2\": { \"k21\": 6.6, \"k22\": [1, 2] } }', '$.k1', '$.k2.k21', '$.k2.k22', '$.k2.k22[1]');\n+-------------------------------------------------------------------------------------------------------------------+\n| json_extract('{\"k1\": \"v1\", \"k2\": { \"k21\": 6.6, \"k22\": [1, 2] } }', '$.k1', '$.k2.k21', '$.k2.k22', '$.k2.k22[1]') |\n+-------------------------------------------------------------------------------------------------------------------+\n| [\"v1\",6.6,[1,2],2] |\n+-------------------------------------------------------------------------------------------------------------------+\n1 row in set (0.01 sec)\n\nmysql> SELECT json_extract('{\"id\": 123, \"name\": \"doris\"}', '$.aaa', '$.name');\n+-----------------------------------------------------------------+\n| json_extract('{\"id\": 123, \"name\": \"doris\"}', '$.aaa', '$.name') |\n+-----------------------------------------------------------------+\n| [null,\"doris\"] 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