title: Cannot compare schemas with SQL Developer
body: <p>I'm trying to compare schemas with the sqldeveloper database difference tool. When it finishes from making the comparison (very fast) it tells me the following in all objects of the database:</p>
  
  <blockquote>
    <p>SCHEMA_NAME.MD5 using SCHEMA_NAME connection. Could not compare objects. Make >sure you have the necessary permissions.
    You must own the objects or have the select_catalog_role</p>
  </blockquote>
  
  <p>Both users have the select_catalog_role role. Am I missing any permissions to assign? Is there something wrong in my database?</p>