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 52.3. 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.