If i have a type x_typ and subtype y_typ, is it possible to create a an object table of x_typ but put a constraint on one of the y_typ attributes ie
create table x_table of x_typ (
constraint constr_y check (y_typ.attribute1 < 5);
);
Thanks
The closest I can come is...
CREATE OR REPLACE TYPE x_typ AS OBJECT (record_type varchar2(1)) NOT FINAL;
/
CREATE OR REPLACE TYPE y_typ UNDER x_typ (attribute1 number) ;
/
create table x_table (x_col x_typ);
alter table x_table add constraint x_cons
check ( 1 = case when x_col is of (y_typ) then
treat (x_col as y_typ).attribute1 else 1 end);
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