标题: ORA-30756: cannot create column or table of type that contains a supertype at... [打印本页] 作者: admin 时间: 2016-9-5 15:42 标题: ORA-30756: cannot create column or table of type that contains a supertype at... ORA-30756: cannot create column or table of type that contains asupertype attribute Cause: The user tried tocreate a column or table of an object type that contains a
supertype attribute. This is not supported because it leads to infiniterecursion in
our current storage model. Note that creating a column of a type implies thatwe
create columns corresponding to all subtype attributes as well. Action: Change the typedefinition to contain a supertype REF attribute instead of
the supertype object attribute.