DROP TYPE
Name
DROP TYPE -- remove a data typeSynopsis
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 5.13).
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.
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Licensed under the PostgreSQL License.
https://www.postgresql.org/docs/9.6/sql-droptype.html