ydb/yql/essentials/tests/s-expressions/suites/Aggregation/InMemAggregateZero.yqls

(
#comment
(let config (DataSource 'config))

(let init_min (lambda '(x) (Member x 'value)))
(let init_count (lambda '(x) (Uint64 '1)))
(let update_min (lambda '(x y) (Min (Member x 'value) y)))
(let update_count (lambda '(x y) (+ y (Uint64 '1))))
(let id (lambda '(x) x))
(let merge_min (lambda '(x y) (Min x y)))
(let merge_count (lambda '(x y) (+ x y)))
(let list (AsList 
(AsStruct '('key (Uint32 '1)) '('value (Uint32 '2)))
))
(let list (Take list (Uint64 '0)))
(let min (AggregationTraits (ListItemType (TypeOf list)) init_min update_min id id merge_min id (Null)))
(let count (AggregationTraits (ListItemType (TypeOf list)) init_count update_count id id merge_count id (Uint64 '0)))
(let resAll (Aggregate list '() '('('minvalue min) '('count count))))
(let res_sink (DataSink 'result))
(let world (Write! world res_sink (Key) resAll '('('type))))
(let world (Commit! world res_sink))
(return world)
)