51.67. 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 51.68. 
    
     pg_available_extension_versions
    
    Columns
   
  
| Name | Type | Description | 
|---|---|---|
| 
        name
        | 
        name
        | Extension name | 
| 
        version
        | 
        text
        | Version name | 
| 
        installed
        | 
        bool
        | True if this version of this extension is currently installed | 
| 
        superuser
        | 
        bool
        | True if only superusers are allowed to install this extension | 
| 
        relocatable
        | 
        bool
        | True if extension can be relocated to another schema | 
| 
        schema
        | 
        name
        | Name of the schema that the extension must be installed into,
       or 
        NULL
       if partially or fully relocatable | 
| 
        requires
        | 
        name[]
        | Names of prerequisite extensions,
       or 
        NULL
       if none | 
| 
        comment
        | 
        text
        | Comment string from the extension's control file | 
  The
  
   pg_available_extension_versions
  
  view is read
   only.