DROP TYPE will remove a user-defined data type. Only the owner of a type can remove it.
Parameters
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, operators).
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, but note that the CREATE TYPE command and the data type extension mechanisms in PostgreSQL differ from the SQL standard.
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