51.66. 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 51.67. 
    
     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.