SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Function min (children 1)
     ExpressionList (children 1)
      Identifier x
    Function max (children 1)
     ExpressionList (children 1)
      Identifier x
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier x
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function CAST (alias x) (children 1)
            ExpressionList (children 2)
             Function arrayJoin (children 1)
              ExpressionList (children 1)
               Literal Array_[UInt64_1, UInt64_2]
             Literal \'Enum8(\\\'Hello\\\' = 1, \\\'World\\\' = 2)\'