PostgreSQL 9.1.3 Documentation
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# DROP EXTENSION

## Name

DROP EXTENSION -- remove an extension

## Synopsis

    DROP EXTENSION [ IF EXISTS ] extension_name [, ...] [ CASCADE | RESTRICT ]

## Description

`DROP EXTENSION` removes extensions from the database. Dropping an extension causes its component objects to be dropped as well.

You must own the extension to use `DROP EXTENSION`.

## Parameters

`IF EXISTS`

  Do not throw an error if the extension does not exist. A notice is issued in this case.

`extension_name`

  The name of an installed extension.

`CASCADE`

  Automatically drop objects that depend on the extension.

`RESTRICT`

  Refuse to drop the extension if any objects depend on it (other than its own member objects and other extensions listed in the same `DROP` command). This is the default.

## Examples

To remove the extension `hstore` from the current database:

    DROP EXTENSION hstore;

This command will fail if any of `hstore`'s objects are in use in the database, for example if any tables have columns of the `hstore` type. Add the `CASCADE` option to forcibly remove those dependent objects as well.

## Compatibility

`DROP EXTENSION` is a PostgreSQL extension.

## See Also

CREATE EXTENSION, ALTER EXTENSION

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