Re: Problem with inheritance

Alfonso Peniche <alfonso@iteso.mx> writes:
> I have the following inheritance relation:

>           user
>               |
>    ----------
>    |                    |
> student      employee

> If I insert John into table student, how can I insert him afterwards so
> that he is also an employee (this could happen several days later)?

If a student could also be an employee, then your table layout is
fundamentally wrong.

			regards, tom lane