create table union_types (
  type text not null,
  description text,
  deprecation ,
  attributes ,
  default boolean
);
comment on table union_types is '
  Metadata about one of the types that is part of a union type
';

comment on column union_types.type is '
  The name of a type (a primitive, model name, or enum name) that makes up this union type
';
comment on column union_types.default is '
  If true, indicates that this type should be used as the default when deserializing union types. This field is only used by union types that require a discriminator and sets the default value for that disciminator during deserialization.
';