of a larger transation, make sure that the statement fully ends so that
subsequent invocations of the same statement will not pass the constraint
because they think the transaction is not closed. This is a merge of
the deferred-fk-quirk branch together with a test case.
FossilOrigin-Name: 2f94d4623f9aae1b5bc7041bd85f4e3a7462c60e
