The nine balance fields are null — never zero — when keyable is
false. "Cannot be measured" and "is empty" are different claims, and the view
goes out of its way to keep them distinguishable (§ 6); collapsing them here
would throw that away at the last step.
Set only on the arms that surface a tombstone. The arms that fall back to
OBSERVED when their source row is soft-deleted project NULL here instead —
the account is still live, it is just no longer registered.
A row of
b2b.bank_account_view.The nine balance fields are
null— never zero — when keyable is false. "Cannot be measured" and "is empty" are different claims, and the view goes out of its way to keep them distinguishable (§ 6); collapsing them here would throw that away at the last step.