UNDROP TYPE

Restores the most recent version of a user-defined type.

See also:

CREATE TYPE , ALTER TYPE , DESCRIBE TYPE , SHOW TYPES , DROP TYPE

语法

UNDROP TYPE <name>

参数

name

指定要恢复的用户定义类型的标识符。

If the identifier contains spaces or special characters, the entire string must be enclosed in double quotes. Identifiers enclosed in double quotes are also case-sensitive.

For more information, see Identifier requirements.

访问控制要求

A role used to execute this operation must have the following privileges at a minimum:

权限对象备注
OWNERSHIP用户定义的类型OWNERSHIP is a special privilege on an object that is automatically granted to the role that created the object, but can also be transferred using the [GRANT OWNERSHIP](/sql-reference/sql/grant-ownership) command to a different role by the owning role (or any role with the MANAGE GRANTS privilege).

Operating on an object in a schema requires at least one privilege on the parent database and at least one privilege on the parent schema.

For instructions on creating a custom role with a specified set of privileges, see Creating custom roles.

For general information about roles and privilege grants for performing SQL actions on securable objects, see Overview of Access Control.

使用说明

  • 仅在当前架构或当前数据库中支持恢复用户定义的类型，即使类型名称是完全限定的。
  • 如果已存在同名用户定义的类型，则返回错误。
  • UNDROP relies on the Snowflake Time Travel feature. An object can be restored only if the object was deleted within the Data retention period. The default value is 24 hours.

示例

Use the UNDROP TYPE command to restore the most recent version of the age user-defined type:

UNDROP TYPE age;