小编Siv*_*r K的帖子

这是我正在尝试做的一个例子，

SELECT *
FROM ( VALUES ('{"a":1}'::json) )
  AS t(data)
WHERE data = '{"a":1}'::json;

但它给了我这个错误，

ERROR:  operator does not exist: json = json
LINE 4: WHERE data = '{"a":1}'::json;
                   ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.