ydb/yql/essentials/tests/s-expressions/suites/Aggregation/AggregateReadWithParents.yql

(
#comment
(let res_sink (DataSink 'result))
(let mr_source (DataSource 'yt 'plato))
(let x (Read! world mr_source (Key '('table (String 'Input))) '('key 'subkey 'value) '()))
(let world (Left! x))
(let table1 (Right! x))
(let init (lambda '(x parent) '(parent (StrictFromString (Member x 'value) 'Uint32))))
(let update_min (lambda '(x y parent) '(parent (AggrMin (StrictFromString (Member x 'value) 'Uint32) (Nth y '1)))))
(let save (lambda '(x) x))
(let load (lambda '(x) x))
(let merge_min (lambda '(x y) (AggrMin x y)))
(let finish (lambda '(x) (Nth x '1)))
(let min (AggregationTraits (ListItemType (TypeOf table1)) init update_min save load merge_min finish (Null)))
(let resAll (Aggregate table1 '() '('('minvalue min))))
(let world (Write! world res_sink (Key) resAll '('('type))))
(let resKey (Aggregate table1 '('key) '('('minvalue min))))
(let sortedOutput (Sort resKey (Bool 'false) (lambda '(x) (Member x 'key) )))
(let world (Write! world res_sink (Key) sortedOutput '('('type))))
(let world (Commit! world res_sink))
(return world)
)