Function EXE_unwind

src/jrd/exe.cpp:916–1001

void EXE_unwind(thread_db* tdbb, Request* request)
{
/**************************************
 *
 *	E X E _ u n w i n d
 *
 **************************************
 *
 * Functional description
 *	Unwind a request, maybe active, maybe not.
 *
 **************************************/
	DEV_BLKCHK(request, type_req);

	SET_TDBB(tdbb);

	if (request->req_flags & req_active)
	{
		const Statement* statement = request->getStatement();

		if (statement->fors.hasData() || request->req_ext_resultset || request->req_ext_stmt)
		{
			Jrd::ContextPoolHolder context(tdbb, request->req_pool);
			Request* old_request = tdbb->getRequest();
			jrd_tra* old_transaction = tdbb->getTransaction();

			try
			{
				tdbb->setRequest(request);
				tdbb->setTransaction(request->req_transaction);

				for (const auto select : statement->fors)
					select->close(tdbb);

				if (request->req_ext_resultset)
				{
					delete request->req_ext_resultset;
					request->req_ext_resultset = nullptr;
				}

				while (request->req_ext_stmt)
					request->req_ext_stmt->close(tdbb);
			}
			catch (const Exception&)
			{
				tdbb->setRequest(old_request);
				tdbb->setTransaction(old_transaction);
				throw;
			}

			tdbb->setRequest(old_request);
			tdbb->setTransaction(old_transaction);
		}

		for (auto localTable : statement->localTables)
		{
			if (!localTable)
				continue;