53.3. `pg_available_extensions`
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## 53.3. `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 53.3. `pg_available_extensions` Columns

Column Type Description
`name` `name` Extension name
`default_version` `text` Name of default version, or `NULL` if none is specified
`installed_version` `text` Currently installed version of the extension, or `NULL` if not installed
`location` `text` The location where the extension is installed. If it is in the standard system location, then the value will be `$system`, while if it is found in the path specified by the `extension_control_path` GUC then the full path will be shown. Only superusers can see this information.
`comment` `text` Comment string from the extension's control file

The `pg_available_extensions` view is read-only.

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