Method populate

src/jrd/Mapping.cpp:1136–1172

			}

			void populate(const string& key, Mapping::DbHandle& iDb)
			{
				if (!key.hasData())
					return;

				if (get(key))
					return;

				ThrowLocalStatus st;
				RefPtr<ITransaction> tra(REF_NO_INCR, iDb->startTransaction(&st, 0, nullptr));

				Message par;
				Field<Varying> user(par, MAX_SQL_IDENTIFIER_SIZE);
				user = key.c_str();

				RefPtr<IResultSet> curs(REF_NO_INCR, iDb->openCursor(&st, tra, 0, sql, 3,
					par.getMetadata(), par.getBuffer(), nullptr, nullptr, 0));

				RefPtr<IMessageMetadata> meta(curs->getMetadata(&st));
				AutoPtr<UCHAR, ArrayDelete> buffer(FB_NEW UCHAR[meta->getMessageLength(&st)]);
				UCHAR* bits = buffer + meta->getOffset(&st, 0);
				UserId::Privileges g, l;

				while(curs->fetchNext(&st, buffer) == IStatus::RESULT_OK)
				{
					l.load(bits);
					g |= l;
				}

				FB_UINT64 gg = 0;
				static_assert(sizeof(gg) >= g.BYTES_COUNT,
					"The value for storing system privileges is too small");

				g.store(&gg);
				MAP_DEBUG(fprintf(stderr, "poprole %s 0x%x\n", key.c_str(), gg));
				put(key, g);
			}

			void invalidate()
			{