DROP DOMAIN
Name
DROP DOMAIN -- remove a domain
Synopsis
DROP DOMAIN [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
描述
DROP DOMAIN removes a domain. Only the owner of
a domain can remove it.
参数
- IF EXISTS
Do not throw an error if the domain does not exist. A notice is issued
in this case.
- name
The name (optionally schema-qualified) of an existing domain.
- CASCADE
Automatically drop objects that depend on the domain (such as
table columns).
- RESTRICT
Refuse to drop the domain if any objects depend on it. This is
the default.
例子
To remove the domain box:
DROP DOMAIN box;
兼容性
This command conforms to the SQL standard, except for the
IF EXISTS option, which is a PostgreSQL
extension.