SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Literal \'3000-01-01\' (alias input)
    Function accurateCastOrNull (alias result) (children 1)
     ExpressionList (children 2)
      Literal \'3000-01-01\'
      Literal \'DateTime\'
   Set
