SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function materialize (alias last_element) (children 1)
     ExpressionList (children 1)
      Literal UInt64_42
    Function cityHash64 (children 1)
     ExpressionList (children 3)
      Function map (children 1)
       ExpressionList
      Function CAST (children 1)
       ExpressionList (children 2)
        Function materialize (children 1)
         ExpressionList (children 1)
          Literal \'\'
        Literal \'LowCardinality(Nullable(String))\'
      Identifier last_element
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_3
