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.