ydb/yql/essentials/tests/s-expressions/suites/ManyYamrOperations/YQL-1733_2.yql

(
(import aggregate_module '"/lib/yql/aggregate.yql")
(import window_module '"/lib/yql/window.yql")
(let world (block '(
  (let x (Read! world (DataSource '"yt" '"plato") (MrTableConcat (Key '('table (String '"Input")))) '('"key" '"value") '()))
  (let world (Left! x))
  (let table0 (Right! x))
  (let output (block '(
    (let select (block '(
      (let core (block '(
        (let select (block '(
          (let core table0)
          (let core (FlatMap core (lambda '(row) (block '(
            (let res (Struct))
            (let res (AddMember res '"key" (Member row '"key")))
            (let res (AddMember res '"subkey" (String '"")))
            (let res (AddMember res '"value" ("Concat" (String '"value:") (Member row '"value"))))
            (let res (AsList res))
            (return res)
          )))))
          (return core)
        )))
        (let select (Sort select (Bool 'true) (lambda '(row) (Member row '"key"))))
        (return select)
      )))
      (let core (FlatMap core (lambda '(row) (block '(
        (let res (AsList row))
        (return res)
      )))))
      (return core)
    )))
    (let select (Take select (Int32 '"2")))
    (return select)
  )))
  (let world (block '(
    (let result_sink (DataSink 'result))
    (let world (Write! world result_sink (Key) output '('('type) '('autoref))))
    (return (Commit! world result_sink))
  )))
  (return world)
)))
(let world (block '(
  (let x (Read! world (DataSource '"yt" '"plato") (MrTableConcat (Key '('table (String '"Input")))) '('"key" '"value") '()))
  (let world (Left! x))
  (let table0 (Right! x))
  (let values (block '(
    (let select (block '(
      (let core (block '(
        (let select (block '(
          (let core table0)
          (let core (FlatMap core (lambda '(row) (block '(
            (let res (Struct))
            (let res (AddMember res '"key" (Member row '"key")))
            (let res (AddMember res '"subkey" (String '"")))
            (let res (AddMember res '"value" ("Concat" (String '"value:") (Member row '"value"))))
            (let res (AsList res))
            (return res)
          )))))
          (return core)
        )))
        (let select (Sort select (Bool 'true) (lambda '(row) (Member row '"key"))))
        (return select)
      )))
      (let core (FlatMap core (lambda '(row) (block '(
        (let res (AsList row))
        (return res)
      )))))
      (return core)
    )))
    (let select (Take select (Int32 '"3")))
    (return select)
  )))
  (let world (block '(
    (let sink (DataSink '"yt" '"plato"))
    (let world (Write! world sink (Key '('table (String '"Output"))) values '('('mode 'append))))
    (return world)
  )))
  (return world)
)))
(let world (block '(
  (let plato_sink (DataSink '"yt" '"plato"))
  (let world (Commit! world plato_sink))
  (return world)
)))
(return world)
)