SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function sum (children 1)
     ExpressionList (children 1)
      Function plus (children 1)
       ExpressionList (children 2)
        Literal UInt64_1
        Function ignore (children 1)
         ExpressionList (children 1)
          Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier a
   Function indexHint (children 1)
    ExpressionList (children 1)
     Function in (children 1)
      ExpressionList (children 2)
       Identifier v
       Literal Tuple_(UInt64_20, UInt64_40)
