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 COVAR1
          Identifier COVAR2
      Literal UInt64_6
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Function arrayJoin (alias ID2) (children 1)
            ExpressionList (children 1)
             Literal Array_[UInt64_1]
           Function covarPop (alias COVAR1) (children 1)
            ExpressionList (children 2)
             Identifier x_value
             Identifier y_value
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier series
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Function arrayJoin (alias ID2) (children 1)
            ExpressionList (children 1)
             Literal Array_[UInt64_1]
           Function divide (alias COVAR2) (children 1)
            ExpressionList (children 2)
             Function sum (children 1)
              ExpressionList (children 1)
               Identifier VAL
             Function count (children 1)
              ExpressionList
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 2)
                 ExpressionList (children 1)
                  Function multiply (alias VAL) (children 1)
                   ExpressionList (children 2)
                    Function minus (children 1)
                     ExpressionList (children 2)
                      Identifier X
                      Identifier AVG_X
                    Function minus (children 1)
                     ExpressionList (children 2)
                      Identifier Y
                      Identifier AVG_Y
                 TablesInSelectQuery (children 2)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 1)
                    Subquery (children 1)
                     SelectWithUnionQuery (children 1)
                      ExpressionList (children 1)
                       SelectQuery (children 2)
                        ExpressionList (children 3)
                         Function toUInt32 (alias ID) (children 1)
                          ExpressionList (children 1)
                           Function arrayJoin (children 1)
                            ExpressionList (children 1)
                             Literal Array_[UInt64_1, UInt64_2, UInt64_3, UInt64_4, UInt64_5, UInt64_6, UInt64_7, UInt64_8, UInt64_9, UInt64_10]
                         Function avg (alias AVG_X) (children 1)
                          ExpressionList (children 1)
                           Identifier x_value
                         Function avg (alias AVG_Y) (children 1)
                          ExpressionList (children 1)
                           Identifier y_value
                        TablesInSelectQuery (children 1)
                         TablesInSelectQueryElement (children 1)
                          TableExpression (children 1)
                           TableIdentifier series
                  TablesInSelectQueryElement (children 2)
                   TableExpression (children 1)
                    Subquery (children 1)
                     SelectWithUnionQuery (children 1)
                      ExpressionList (children 1)
                       SelectQuery (children 2)
                        ExpressionList (children 3)
                         Identifier i (alias ID)
                         Identifier x_value (alias X)
                         Identifier y_value (alias Y)
                        TablesInSelectQuery (children 1)
                         TablesInSelectQueryElement (children 1)
                          TableExpression (children 1)
                           TableIdentifier series
                   TableJoin (children 1)
                    ExpressionList (children 1)
                     Identifier ID
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier ID2