From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,229ea0001655d6a2 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news2.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!news.belwue.de!newsfeed.arcor.de!newsspool1.arcor-online.net!news.arcor.de.POSTED!not-for-mail From: "Dmitry A. Kazakov" Subject: Re: Generic Package Newsgroups: comp.lang.ada User-Agent: 40tude_Dialog/2.0.15.1 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Reply-To: mailbox@dmitry-kazakov.de Organization: cbb software GmbH References: <1177539306.952515.222940@s33g2000prh.googlegroups.com> <1177601484.444701.171560@r35g2000prh.googlegroups.com> Date: Fri, 27 Apr 2007 11:00:20 +0200 Message-ID: NNTP-Posting-Date: 27 Apr 2007 11:00:19 CEST NNTP-Posting-Host: c88e5d66.newsspool3.arcor-online.net X-Trace: DXC=;2_o@^1:LFkUoRk[hk2WalMcF=Q^Z^V3h4Fo<]lROoRaFl8W>\BH3YbKYQ2DP^03kjDNcfSJ;bb[eFCTGGVUmh?dLK[5LiR>kgb=;bLC26E?ia X-Complaints-To: usenet-abuse@arcor.de Xref: g2news1.google.com comp.lang.ada:15346 Date: 2007-04-27T11:00:19+02:00 List-Id: On Thu, 26 Apr 2007 22:52:58 +0100, Simon Wright wrote: > "Dmitry A. Kazakov" writes: > >> You cannot iterate a relational table, because there is no order >> defined on it. > > Why would that stop me iterating over all the rows? Because iterating presumes following an order. If there is no *any* order, which one would you follow? It is clear that we could enumerate anything on a real computer, but that would be same as Unchecked_Conversion, it would break the abstraction. I guess, one should first create a "result set", then enumerate it according to some order relation. That thing could be iterated through. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de