Issue on docs #3357
Description
Path:/zh-CN/docs/2.1/sql-manual/sql-functions/scalar-functions/json-functions/get-json-string
在2.1.11版本中SELECT get_json_string('[{"k1":"v1"}, {"k2":"v2"}, {"k1":"v3"}, {"k1":"v4"}]', '$.k1');这个命令与文档反应的效果并不相同
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