SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 6)
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier x
    Function count (children 1)
     ExpressionList (children 1)
      Identifier x
    Function avg (children 1)
     ExpressionList (children 1)
      Identifier x
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function sum (children 1)
       ExpressionList (children 1)
        Identifier x
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function count (children 1)
       ExpressionList (children 1)
        Identifier x
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function avg (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 2)
          ExpressionList (children 1)
           Function CAST (alias x) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal \'Decimal32(0)\'
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_10