> > create table t1
> > (
> > f1 integer,
> > f2 integer
> > );
> >
> > create table t2
> > (
> > f1 integer references t1(f1),
> > f2 integer
> > );
>
> > begin transaction;
> > insert into t1(f1,f2) values(1,1);
> > delete from t1 where f1=1;
>
> > ERROR: triggered data change violation on relation "t1"
>
> You cannot change data twice within a transaction if there's a RI
> constraint on the table. This is per SQL, nothing we can do about it. ^^^^^^^^^^^^^^^
Is it true?! *Any reasons* for this? DELETE doesn't break integrity rules.
Just tested it in Oracle - deletion is allowed!
But yes, I know that Oracle doesn't always follow standards -:)
Can someone test it under Informix, others?
Vadim