> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/reference/sql-commands/sql-dropforeigndatawrapper.md).

# DROP FOREIGN DATA WRAPPER

### DROP FOREIGN DATA WRAPPER

DROP FOREIGN DATA WRAPPER — remove a foreign-data wrapper

### Synopsis

```

DROP FOREIGN DATA WRAPPER [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
```

### Description

`DROP FOREIGN DATA WRAPPER` removes an existing foreign-data wrapper. To execute this command, the current user must be the owner of the foreign-data wrapper.

### Parameters

`IF EXISTS` : Do not throw an error if the foreign-data wrapper does not exist. A notice is issued in this case.

*`name`* : The name of an existing foreign-data wrapper.

`CASCADE` : Automatically drop objects that depend on the foreign-data wrapper (such as foreign tables and servers), and in turn all objects that depend on those objects (see [Section 5.15](/the-sql-language/ddl/ddl-depend.md)).

`RESTRICT` : Refuse to drop the foreign-data wrapper if any objects depend on it. This is the default.

### Examples

Drop the foreign-data wrapper `dbi`:

```

DROP FOREIGN DATA WRAPPER dbi;
```

### Compatibility

`DROP FOREIGN DATA WRAPPER` conforms to ISO/IEC 9075-9 (SQL/MED). The `IF EXISTS` clause is a PostgreSQL extension.

### See Also

[CREATE FOREIGN DATA WRAPPER](/reference/sql-commands/sql-createforeigndatawrapper.md), [ALTER FOREIGN DATA WRAPPER](/reference/sql-commands/sql-alterforeigndatawrapper.md)

***

原文：[PostgreSQL 18.6 Documentation](https://www.postgresql.org/docs/18/sql-dropforeigndatawrapper.html)（英文原文，待翻譯）


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