
> > > This certainly sounds like these two are different projects by the
same
> > > Prof.
> > 
> > Right.
> 
> Yes, and that's how I remember it.

IIRC Postgres started out with the same [but extended] query language as
Ingres.
So I think they are not completely unrelated.

Andreas

Fri, 30 Nov 2001 17:44:08 +0100
"Zeugswetter Andreas SB SD" <ZeugswetterA@spardat.at>
Re: History question
"Zeugswetter Andreas SB SD" <ZeugswetterA@spardat.at> writes:
> IIRC Postgres started out with the same [but extended] query language as
> Ingres.
> So I think they are not completely unrelated.

QUEL and POSTQUEL are the two query languages in question, I believe.
Never having studied either, I have no clue how closely they are
related.

In any case, I'm pretty sure that Postgres was a completely new
implementation that used none of the Ingres code.  The no-overwrite
storage management scheme was definitely a new concept in Postgres.

			regards, tom lane

Fri, 30 Nov 2001 12:29:31 -0500
Tom Lane <tgl@sss.pgh.pa.us>
Re: History question 
> "Zeugswetter Andreas SB SD" <ZeugswetterA@spardat.at> writes:
> > IIRC Postgres started out with the same [but extended] query language as
> > Ingres.
> > So I think they are not completely unrelated.
> 
> QUEL and POSTQUEL are the two query languages in question, I believe.
> Never having studied either, I have no clue how closely they are
> related.

The languages were almost identical, except for the object creation
extensions.


> In any case, I'm pretty sure that Postgres was a completely new
> implementation that used none of the Ingres code.  The no-overwrite
> storage management scheme was definitely a new concept in Postgres.

None shared.  I have the Ingres code here and it is pretty small. 
Entire source is only 1.7 megs uncompressed.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
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Fri, 30 Nov 2001 13:03:23 -0500 (EST)
Bruce Momjian <pgman@candle.pha.pa.us>
Re: History question