(
(let $1 (DataType 'String))
(let $2 (DqPhyStage '() (lambda '() (block '(
  (let $6 '@@["StructType";[["key";["DataType";"String"]];["subkey";["DataType";"String"]];["value";["DataType";"String"]]]]@@)
  (let $7 (YqlRowSpec '('NativeYtTypeFlags '0) '('StrictSchema '1) '('UniqueKeys '0) '('Type $6)))
  (let $8 (YtMeta '('CanWrite '1) '('DoesExist '1) '('YqlCompatibleScheme '1) '('InferredScheme '0) '('IsDynamic '0) '('Attrs '('('"native_strict_schema" '"false")))))
  (let $9 (YtStat '('Id '"Input0") '('RecordsCount '"4") '('DataSize '"166") '('ChunkCount '1) '('ModifyTime '0) '('Revision '0)))
  (let $10 (YtTable '"Input0" $7 $8 $9 '() (Void) (Void) '"/Root/plato"))
  (let $11 (YtReadTable! world (DataSource '"yt" '"/Root/plato") '((YtSection '((YtPath $10 '('"value") (Void) (Void))) '()))))
  (return (FromFlow (NarrowMap (DqReadWideWrap $11 '()) (lambda '($12) (block '(
    (let $13 (CallableType '() '($1) '((OptionalType $1))))
    (let $14 (Udf '"SimpleUdf.Echo" (Void) (VoidType) '"" $13 (VoidType) '"" '()))
    (return (AsStruct '('"val" (Apply $14 (Just $12)))))
  ))))))
))) '('('"_logical_id" '478) '('"_id" '"610e10b9-602c93c3-63b4ac28-d5a38fa0"))))
(let $3 (DqCnUnionAll (TDqOutput $2 '0)))
(let $4 (DqPhyStage '($3) (lambda '($15) $15) '('('"_logical_id" '523) '('"_id" '"7e7e3245-a09b5fb-31030082-42b9e11b"))))
(let $5 (DqCnResult (TDqOutput $4 '0) '('"val")))
(return (KqpPhysicalQuery '((KqpPhysicalTx '($2 $4) '($5) '() '('('"type" '"generic")))) '((KqpTxResultBinding (ListType (StructType '('"val" $1))) '0 '0)) '('('"type" '"query"))))
)
