ydb/yql/essentials/tests/s-expressions/suites/Optimizers/EquivNestedLambdaOuterSameLevel.yqls

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

(let res_sink (DataSink 'result))
(let outLambda1 (lambda '(sep) (block '(
   (let data (AsList (String 'a) (String 'b)))
   (let data1 (Map data (lambda '(x) (Concat x sep))))
   (let res data1)
   (return res)
))))

(let outLambda2 (lambda '(sep) (block '(
   (let data (AsList (String 'a) (String 'b)))
   (let data1 (Map data (lambda '(x) (Concat x sep))))
   (let res data1)
   (return res)
))))

(let predicate (== (Int32 '1) (Int32 '2)))
(let sep (If predicate (Just (String '_)) (Just (String '+))))
(let data1 (IfPresent sep outLambda1 (AsList (String 'none))))
(let data2 (IfPresent sep outLambda2 (AsList (String 'none))))
(let world (Write! world res_sink (Key) '(data1 data2) '('('type))))
(let world (Commit! world res_sink))
(return world)
)