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PostgreSQL 9.4.26 Documentation
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48.55. 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 48-56. pg_available_extensions Columns

Name 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
comment text Comment string from the extension's control file

The pg_available_extensions view is read only.

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System Views Up pg_available_extension_versions