Re: Oracle MINUS is not supported

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Denis Perchine <dyp(at)perchine(dot)com>, pgsql-patches(at)postgresql(dot)org
Subject: Re: Oracle MINUS is not supported
Date: 2001-03-10 18:18:14
Message-ID: 200103101818.NAA22929@candle.pha.pa.us
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> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > we would rather have a pass over the queries before they reach our
> > grammar. The pass would restructure any Oracle-specific syntax into
> > PostgreSQL syntax.
>
> More specifically, a separate program to convert Oracle-isms into
> Postgres-isms (and, perhaps, MySQL-isms, DB2-isms, ...). Feed it
> a script, get a new script back.
>
> Do we have a TODO list entry for this? I don't see it offhand.
> I do see something about an SQL*Net listener, which would probably
> need to run this sort of conversion on-the-fly, but ISTM the first
> step ought to be a simple script converter.

Added now:

* Convert non-Ansi feature to PostgreSQL features

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