pg_available_extensions #
   The pg_available_extensions view lists the
   extensions that are available for installation.
   See also the
   pg_extension
   catalog, which shows the extensions currently installed.
  
Table 52.2. pg_available_extensions Columns
| Column Type Description | 
|---|
| 
        Extension name | 
| 
        
       Name of default version, or  | 
| 
        
       Currently installed version of the extension,
       or  | 
| 
        Comment string from the extension's control file | 
   The pg_available_extensions view is read-only.