drop_type(7l)

NAME

DROP TYPE - remove a user-defined data type

SYNOPSIS

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

•: It is the user's responsibility to remove any operators, functions, aggregates, access methods, subtypes, and tables that use a deleted type. However, the associated array data type (which was automatically created by CREATE TYPE) will be removed automatically.

•: If a built-in type is removed, the behavior of the server is unpredictable.

EXAMPLES

To remove the box type:

DROP TYPE box;

COMPATIBILITY

A DROP TYPE statement exists in SQL99. As with most other ``drop'' commands, DROP TYPE in SQL99 requires a ``drop behavior'' clause to select between dropping all dependent objects or refusing to drop if dependent objects exist:

DROP TYPE name { CASCADE | RESTRICT }

PostgreSQL currently ignores dependencies altogether.

Note that the CREATE TYPE command and the data type extension mechanisms in PostgreSQL differ from SQL99.