Postgresql 中文操作指南

DROP TRANSFORM

DROP TRANSFORM - 删除转换

DROP TRANSFORM — remove a transform

DROP TRANSFORM [ IF EXISTS ] FOR type_name LANGUAGE lang_name [ CASCADE | RESTRICT ]

DROP TRANSFORM 删除先前定义的转换。

DROP TRANSFORM removes a previously defined transform.

要能够删除转换，您必须拥有该类型和该语言。这些是创建转换所需的特权。

To be able to drop a transform, you must own the type and the language. These are the same privileges that are required to create a transform.

IF EXISTS
- Do not throw an error if the transform does not exist. A notice is issued in this case.
type_name
- The name of the data type of the transform.
lang_name
- The name of the language of the transform.
CASCADE
- Automatically drop objects that depend on the transform, and in turn all objects that depend on those objects (see Section 5.14).
RESTRICT
- Refuse to drop the transform if any objects depend on it. This is the default.

要删除类型 hstore 和语言 plpython3u 的转换：

To drop the transform for type hstore and language plpython3u:

DROP TRANSFORM FOR hstore LANGUAGE plpython3u;

此形式的 DROP TRANSFORM 是 PostgreSQL 扩展。有关详细信息，请参见 CREATE TRANSFORM 。

This form of DROP TRANSFORM is a PostgreSQL extension. See CREATE TRANSFORM for details.