DROP TRANSFORM

7 SQL - Language Statements

DROP TRANSFORM

remove a transform

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

## Description

`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.

## Parameters

`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 ddl-depend).

`RESTRICT`

- Refuse to drop the transform if any objects depend on it. This is the default.

## Examples

To drop the transform for type `hstore` and language `plpython3u`:

    DROP TRANSFORM FOR hstore LANGUAGE plpython3u;

## Compatibility

This form of `DROP TRANSFORM` is a PostgreSQL extension. See sql-createtransform for details.

## See Also

- sql-createtransform