Интересная фича fieldId2ext
X++:
Query q = new Query();
QueryBuildDataSource qbds;
;
qbds = q.addDataSource(tableNum(InventTable));
qbds.addRange(fieldNum(InventTable, ItemId)).value("8");
qbds.addRange(fieldid2ext(fieldNum(InventTable, ItemId),1)).value("2");
info(qbDS.toString());