SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier users (alias u1)
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier uid
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 3)
         ExpressionList (children 1)
          Function sum (children 1)
           ExpressionList (children 1)
            Identifier age
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            TableIdentifier users (alias u2)
         Function equals (children 1)
          ExpressionList (children 2)
           Identifier u1.name
           Identifier u2.name
