50.58. 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 50.59. pg_available_extensions Columns
| Name | Type | Description | 
|---|---|---|
| name | name | Extension name | 
| default_version | text | Name of default version, or NULLif none is specified | 
| installed_version | text | Currently installed version of the extension, or NULLif not installed | 
| comment | text | Comment string from the extension's control file | 
 The pg_available_extensions view is read only.