PostgreSQL
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# DROP TYPE

## Name

DROP TYPE — Removes a user-defined type from the system catalogs

    DROP TYPE typename

### Inputs

`typename`

  The name of an existing type.

### Outputs

`DROP`

  The message returned if the command is successful.

`ERROR: RemoveType: type '`typename`' does not exist`

  This message occurs if the specified type is not found.

## Description

DROP TYPE will remove a user type from the system catalogs.

Only the owner of a type can remove it.

### Notes

DROP TYPE statement is a Postgres language extension.

Refer to CREATE TYPE for inforamation on how to create types.

It is the user's responsibility to remove any operators, functions, aggregates, access methods, subtypes, and classes that use a deleted type.

If a built-in type is removed, the behavior of the backend is unpredictable.

## Usage

To remove the `box` type:

    DROP TYPE box;

## Compatibility

### SQL3

DROP TYPE is a SQL3 statement.

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