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)
          Function corr (children 1)
           ExpressionList (children 2)
            Identifier x_value
            Identifier y_value
          Function divide (children 1)
           ExpressionList (children 2)
            Function covarPop (children 1)
             ExpressionList (children 2)
              Identifier x_value
              Identifier y_value
            Function multiply (children 1)
             ExpressionList (children 2)
              Function stddevPop (children 1)
               ExpressionList (children 1)
                Identifier x_value
              Function stddevPop (children 1)
               ExpressionList (children 1)
                Identifier y_value
      Literal UInt64_6
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier series