title: Operator does not exist: json = json
body: <p>when I try to select some record from a table</p>
  
  <pre><code>    SELECT * FROM movie_test WHERE tags = ('["dramatic","women", "political"]'::json)
  </code></pre>
  
  <p>The sql code cast a error</p>
  
  <pre><code>LINE 1: SELECT * FROM movie_test WHERE tags = ('["dramatic","women",...
                                          ^
  HINT:  No operator matches the given name and argument type(s). You might      need to add explicit type casts.
  
  ********** 错误 **********
  
  ERROR: operator does not exist: json = json
  SQL 状态: 42883
  指导建议:No operator matches the given name and argument type(s). You might need to add explicit type casts.
  字符:37
  </code></pre>
  
  <p>Did I miss something or where I can learn something about this error.</p>