ydb/yql/essentials/tests/s-expressions/suites/SingleYamrOperation/program21.yql

(
#comment
(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 tresh (String '100))
(let table1low (Filter table1 (lambda '(item) (< (Member item 'key) tresh))))
(let table1new (Map table1low (lambda '(item) (block '(
  (let s (Struct))
  (let s (AddMember s 'key (Concat (String '*) (Member item 'key))))
  (return s)
)))))
(let table1new2 (FlatMap table1new (lambda '(item) (block '(
  (let s (AddMember item 'value (String '.)))
  (let s (AddMember s 'subkey (String '.)))
  (let s1 (AsList s))
  (let s (Append s1 s))
  (return s)
)))))
(let table1new3 (Filter table1new2 (lambda '(item) (> (Member item 'key) (String '*030)))))
(let mr_sink (DataSink 'yt (quote plato)))
(let world (Write! world mr_sink (Key '('table (String 'Output))) table1new3 '('('mode 'append))))
(let world (Commit! world mr_sink))
(return world)
)