SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 4)
    Function multiply (children 1)
     ExpressionList (children 2)
      Function avg (children 1)
       ExpressionList (children 1)
        Identifier b
      Literal UInt64_3
    Function plus (children 1)
     ExpressionList (children 2)
      Function plus (children 1)
       ExpressionList (children 2)
        Function sum (children 1)
         ExpressionList (children 1)
          Identifier b
        Literal UInt64_1
      Function count (children 1)
       ExpressionList (children 1)
        Identifier b
    Function multiply (children 1)
     ExpressionList (children 2)
      Function count (children 1)
       ExpressionList (children 1)
        Identifier b
      Function count (children 1)
       ExpressionList (children 1)
        Identifier b
    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)
           Identifier b
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier fuse_tbl