> 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-droplanguage.md).

# DROP LANGUAGE

### DROP LANGUAGE

DROP LANGUAGE — remove a procedural language

### Synopsis

```

DROP [ PROCEDURAL ] LANGUAGE [ IF EXISTS ] name [ CASCADE | RESTRICT ]
```

### Description

`DROP LANGUAGE` removes the definition of a previously registered procedural language. You must be a superuser or the owner of the language to use `DROP LANGUAGE`.

#### Note

As of PostgreSQL 9.1, most procedural languages have been made into “extensions”, and should therefore be removed with [`DROP EXTENSION`](/reference/sql-commands/sql-dropextension.md) not `DROP LANGUAGE`.

### Parameters

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

*`name`* : The name of an existing procedural language.

`CASCADE` : Automatically drop objects that depend on the language (such as functions in the language), 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 language if any objects depend on it. This is the default.

### Examples

This command removes the procedural language `plsample`:

```

DROP LANGUAGE plsample;
```

### Compatibility

There is no `DROP LANGUAGE` statement in the SQL standard.

### See Also

[ALTER LANGUAGE](/reference/sql-commands/sql-alterlanguage.md), [CREATE LANGUAGE](/reference/sql-commands/sql-createlanguage.md)

***

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


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