ydb/yql/essentials/tests/s-expressions/suites/SingleYamrOperation/program8.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 mr_sink (DataSink 'yt (quote plato)))
(let world (Write! world mr_sink (Key '('table (String 'Output))) table1 '('('mode 'append))))
(let world (Commit! world mr_sink))
(return world)
)