Method getTransaction

src/jrd/extds/ExtDS.cpp:1653–1693

}

Transaction* Transaction::getTransaction(thread_db* tdbb, Connection* conn, TraScope tra_scope)
{
	jrd_tra* tran = tdbb->getTransaction();
	Transaction* ext_tran = conn->findTransaction(tdbb, tra_scope);

	if (!ext_tran)
	{
		ext_tran = conn->createTransaction();

		TraModes traMode = traConcurrency;
		if (tran->tra_flags & TRA_read_committed)
		{
			if (tran->tra_flags & TRA_read_consistency)
				traMode = traReadCommitedReadConsistency;
			else if (tran->tra_flags & TRA_rec_version)
				traMode = traReadCommitedRecVersions;
			else
				traMode = traReadCommited;
		}
		else if (tran->tra_flags & TRA_degree3) {
			traMode = traConsistency;
		}

		try {
			ext_tran->start(tdbb,
				tra_scope,
				traMode,
				tran->tra_flags & TRA_readonly,
				tran->getLockWait() != 0,
				-tran->getLockWait()
			);
		}
		catch (const Exception&)
		{
			conn->deleteTransaction(tdbb, ext_tran);
			throw;
		}
	}

	return ext_tran;
}

void Transaction::detachFromJrdTran()
{