From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
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To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Jan Wieck <JanWieck(at)Yahoo(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Robert Treat <xzilla(at)users(dot)sourceforge(dot)net>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Add Missing From? |
Date: | 2004-08-10 15:00:26 |
Message-ID: | 200408101500.i7AF0Qq15552@candle.pha.pa.us |
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Lists: | pgsql-hackers |
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > There is no way to specify a table alias for the deleted table in
> > the DELETE WHERE clause because there is no FROM clause.
>
> This description confuses two quite separate issues.
Yea, it does.
How is this text:
* Allow DELETE to handle table aliases for self-joins
There is no way to create a table alias for the deleted table for use
in the DELETE WHERE clause. The agreed approach is to allow a USING
clause to specify additional tables. UPDATE already has an optional
FROM clause for this purpose.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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