/* syntax version 1 */
select AGGREGATE_LIST_DISTINCT(x) from
(select [[1,2],[1,2,3],YQL::LazyList([1,2])] as x)
flatten list by x;

select AGGREGATE_LIST_DISTINCT(x) from
(select [YQL::LazyList([1,2]),[1,3], YQL::LazyList([1,2])] as x)
flatten list by x;