ydb/yql/essentials/tests/sql/suites/lambda/lambda_no_dollar_arg.sqlx

/* postgres can not */
USE plato;

$shiftSteps=1;
$linear = ($x, $z)->{
  $v = 10 * $z + $x;
  $shift = (item) -> {return $item << $shiftSteps}; -- must use '$' for lambda arguments, should be $item
  $res = Math::Floor(Math::Pi() * $shift($v));
  return $res
};

--INSERT INTO Output
SELECT t.*, $linear(cast(key as uint64), cast(subkey as uint64)) FROM Input as t;