SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Literal UInt64_11 (alias z)
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 2)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal UInt64_2
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal UInt64_3
   ExpressionList (children 3)
    Literal UInt64_42
    Literal UInt64_43
    Literal UInt64_44
