DROP TRANSFORM

remove a transform

English manual coverage begins with PostgreSQL 6.4. Source history and runtime observations have their own recorded version boundaries.

Reading PG 18·Select a recorded version

anchor: SQL-DROPTRANSFORM
file: sql-droptransform.html
lang: en
name: DROP TRANSFORM
purpose: remove a transform
purpose zh: 移除一个转换
sections same as: Unknown
slug: 18
synopsis html: DROP TRANSFORM [ IF EXISTS ] FOR <em class="replaceable"><code>type_name</code></em> LANGUAGE <em class="replaceable"><code>lang_name</code></em> [ CASCADE | RESTRICT ]
synopsis text: DROP TRANSFORM [ IF EXISTS ] FOR type_name LANGUAGE lang_name [ CASCADE | RESTRICT ]

Syntax

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

Syntax diagrams

Read left to right. Branches are choices, bypasses are optional, loops repeat. Select an underlined parameter to open its rule.

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

DROP TRANSFORM removes a previously defined transform.

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 5.15).
RESTRICT: Refuse to drop the transform if any objects depend on it. This is the default.

To drop the transform for type hstore and language plpython3u:

DROP TRANSFORM FOR hstore LANGUAGE plpython3u;

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

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:d37748f0fce7b8670dd8a46f8b1d483edbc604d4c019a4c63575b55b214a20be

Text language: en · wiki-repair-20261023:d37748f0fce7b8670dd8a46f8b1d483edbc604d4c019a4c63575b55b214a20be