sql - PostgreSQL creating enum of enums -

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I'm thinking that for example in postgresql there is a way to create an enum enum: 

  An animation of animation ('stop-motion', 'CGI', 'motion-capture') is

and 

  is a moviegener

With this method, I can include something like: 

  Ambience (animation, 'fantasy', 'SCAI', 'horror') films ( Name, style) values ​​('donation of planetary planets', 'motion-capture'), ('annabel', 'horror')

and may 

  
  ltree  the data type will be forwarded, see the documentation.  ltree  Data type In your case there is an elegant hierarchical structure for label type information. Your label path will be: 
 
  animation animation. Stop-motion animation. CGI Animation. Motion-Capture Fancy Sci-fi horror  
 
 and your related  INSERT  statement: 
 
  Movie (name, style ) Include in values ​​('Don' of Planes Planet ',' Animation. Motion-Capture '), (' Annabelle, '' Horror ');  
 
 and  SELECT  statement: 
 
  movies from SELECT * where the style & lt; @ 'Animation';  
 
 This  SELECT  statement will return all records that are of three animation types. 
 
 Note that  ltree  is an extension, so your superster has to create an  extension lottery;  If for other purposes he has not done so already.

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