Method rollback

src/jrd/Savepoint.cpp:435–479

}

Savepoint* Savepoint::rollback(thread_db* tdbb, Savepoint* prior, bool preserveLocks)
{
	// Undo changes made in this savepoint.
	// Perform index and BLOB cleanup if needed.
	// At the exit savepoint is clear and safe to reuse.

	jrd_tra* const old_tran = tdbb->getTransaction();

	try
	{
		DFW_delete_deferred(m_transaction, m_number);
		m_flags &= ~SAV_force_dfw;

		AutoSetRestoreFlag<ULONG> verbCleanupFlag(&tdbb->tdbb_flags, TDBB_verb_cleanup, true);

		tdbb->setTransaction(m_transaction);

		while (m_actions)
		{
			VerbAction* const action = m_actions;
			VerbAction* preserveAction = nullptr;

			if (preserveLocks && m_next)
				preserveAction = m_next->createAction(action->vct_relation);

			action->undo(tdbb, m_transaction, preserveLocks, preserveAction);

			m_actions = action->vct_next;
			action->vct_next = m_freeActions;
			m_freeActions = action;
		}

		tdbb->setTransaction(old_tran);
	}
	catch (const Exception& ex)
	{
		Arg::StatusVector error(ex);
		tdbb->setTransaction(old_tran);
		m_transaction->tra_flags |= TRA_invalidated;
		error.prepend(Arg::Gds(isc_savepoint_backout_err));
		error.raise();
	}

	return release(prior);
}

Savepoint* Savepoint::rollforward(thread_db* tdbb, Savepoint* prior)
{