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Removes a domain.
DROP DOMAIN [IF EXISTS] name [, ...] [CASCADE | RESTRICT]
DROP DOMAIN removes a previously defined domain. You must be the owner of a domain to drop it.
- IF EXISTS
- Do not throw an error if the domain does not exist. A notice is issued in this case.
- The name (optionally schema-qualified) of an existing domain.
- Automatically drop objects that depend on the domain (such as table columns).
- Refuse to drop the domain if any objects depend on it. This is the default.
Drop the domain named zipcode:
DROP DOMAIN zipcode;
This command conforms to the SQL standard, except for the IF EXISTS option, which is a Greenplum Database extension.