54.3. pg_available_extension_versions
  The
  
   pg_available_extension_versions
  
  view lists the
   specific extension versions that are available for installation.
   See also the
  
   
    pg_extension
   
  
  catalog, which shows the extensions currently installed.
 
   
    Table 54.3. 
    
     pg_available_extension_versions
    
    Columns
   
  
| 
        Column Type Description  | 
     
|---|
| 
        
         Extension name  | 
     
| 
        
         Version name  | 
     
| 
        
         True if this version of this extension is currently installed  | 
     
| 
        
         
        True if only superusers are allowed to install this extension
       (but see
          | 
     
| 
        
         True if the extension can be installed by non-superusers with appropriate privileges  | 
     
| 
        
         True if extension can be relocated to another schema  | 
     
| 
        
         
        Name of the schema that the extension must be installed into,
       or
          | 
     
| 
        
         
        Names of prerequisite extensions,
       or
          | 
     
| 
        
         Comment string from the extension's control file  | 
     
  The
  
   pg_available_extension_versions
  
  view is
   read-only.