Hi,
* Commit 7086be6e3 should have documented the limitation that the
direct modification is disabled when WCO constraints are present, but
didn't, which is definitely my fault.
* Commit fc22b6623 should have documented the limitation that the
direct modification is disabled when generated columns are defined,
but didn't.
Attached is a patch for updating the documentation.
Best regards,
Etsuro Fujita