54.68. 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 54.69. 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.