> 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-dropmaterializedview.md).

# DROP MATERIALIZED VIEW

### DROP MATERIALIZED VIEW

DROP MATERIALIZED VIEW — remove a materialized view

### Synopsis

```

DROP MATERIALIZED VIEW [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
```

### Description

`DROP MATERIALIZED VIEW` drops an existing materialized view. To execute this command you must be the owner of the materialized view.

### Parameters

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

*`name`* : The name (optionally schema-qualified) of the materialized view to remove.

`CASCADE` : Automatically drop objects that depend on the materialized view (such as other materialized views, or regular views), 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 materialized view if any objects depend on it. This is the default.

### Examples

This command will remove the materialized view called `order_summary`:

```

DROP MATERIALIZED VIEW order_summary;
```

### Compatibility

`DROP MATERIALIZED VIEW` is a PostgreSQL extension.

### See Also

[CREATE MATERIALIZED VIEW](/reference/sql-commands/sql-creatematerializedview.md), [ALTER MATERIALIZED VIEW](/reference/sql-commands/sql-altermaterializedview.md), [REFRESH MATERIALIZED VIEW](/reference/sql-commands/sql-refreshmaterializedview.md)

***

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


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