Hello Ann,

Thank you for the brilliant explanation ! This really helps.

One question though :

> Table constraints, field constraints, unique constraints (and unique
> indexes), and relational integrity constraints all run in the system
> transaction context.

What do you mean by "table constraints" ? CHECKs defined at the table level
?
I've played with some select-form CHECKs, and it seems they run in the
*current* tx context unlike other constraints.

Regards.

--
Jerome