DROP TYPE
DROP TYPE
DROP TYPE - remove a data type
Synopsis
DROP TYPE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
Description
DROP TYPE
removes a user-defined data type.
Only the owner of a type can remove it.
Parameters
-
IF EXISTS -
Do not throw an error if the type does not exist. A notice is issued in this case.
-
name -
The name (optionally schema-qualified) of the data type to remove.
-
CASCADE -
Automatically drop objects that depend on the type (such as table columns, functions, and operators), and in turn all objects that depend on those objects (see Section 5.14 ).
-
RESTRICT -
Refuse to drop the type if any objects depend on it. This is the default.
Examples
To remove the data type
box
:
DROP TYPE box;
Compatibility
This command is similar to the corresponding command in the SQL
standard, apart from the
IF EXISTS
option, which is a
PostgreSQL
extension.
But note that much of the
CREATE TYPE
command
and the data type extension mechanisms in
PostgreSQL
differ from the SQL standard.