| From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Leon <leon(at)udmnet(dot)ru> |
| Cc: | David Warnock <david(at)sundayta(dot)co(dot)uk>, pgsql-general <pgsql-general(at)postgreSQL(dot)org> |
| Subject: | Re: Re[2]: [GENERAL] Joins and links |
| Date: | 1999-07-05 19:10:34 |
| Message-ID: | 199907051910.PAA07970@candle.pha.pa.us |
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| Thread: | |
| Lists: | pgsql-general pgsql-hackers |
> Hello David,
>
> Monday, July 05, 1999 you wrote:
>
> D> I have just been thinking a bit more and have realised that the
> D> multi-generational architecture of 6.5 (which I have used in Interbase)
> D> means that probably both clustering (in thr dynamic sense) and full
> D> record number support as request by Leon are impractical.
>
> D> It seems to me that record number relationships will fail completely if
> D> there can be more than one version of a record.
>
> Maybe it is a silly question, but what are "more than one version
> of a record"? In my opinion record is a atomic unique entity.
> Isn't it?
Read how MVCC works in the manuals.
--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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