SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function round (children 1)
     ExpressionList (children 2)
      Function abs (children 1)
       ExpressionList (children 1)
        Function minus (children 1)
         ExpressionList (children 2)
          Identifier res1
          Identifier res2
      Literal UInt64_6
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Function varSamp (alias res1) (children 1)
            ExpressionList (children 1)
             Identifier x_value
           Function divide (alias res2) (children 1)
            ExpressionList (children 2)
             Function minus (children 1)
              ExpressionList (children 2)
               Function sum (children 1)
                ExpressionList (children 1)
                 Function multiply (children 1)
                  ExpressionList (children 2)
                   Identifier x_value
                   Identifier x_value
               Function divide (children 1)
                ExpressionList (children 2)
                 Function multiply (children 1)
                  ExpressionList (children 2)
                   Function sum (children 1)
                    ExpressionList (children 1)
                     Identifier x_value
                   Function sum (children 1)
                    ExpressionList (children 1)
                     Identifier x_value
                 Function count (children 1)
                  ExpressionList
             Function minus (children 1)
              ExpressionList (children 2)
               Function count (children 1)
                ExpressionList
               Literal UInt64_1
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier series