SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function toInt64 (alias new_x) (children 1)
     ExpressionList (children 1)
      Literal UInt64_2
   ExpressionList (children 1)
    Asterisk (children 1)
     ColumnsTransformerList (children 1)
      ColumnsReplaceTransformer (children 1)
       ColumnsReplaceTransformer::Replacement (children 1)
        Identifier new_x
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias t) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal UInt64_1 (alias x)
