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help / color / mirror / Atom feedFrom: Tom Lane <[email protected]>
To: =?KOI8-R?B?98nL1M/SIPfJ08zPws/Lz9c=?= <[email protected]>
Cc: PostgreSQL-documentation <[email protected]>
Subject: Re: Undocumented trick in SELECT?
Date: Sun, 04 Apr 2010 12:26:17 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
=?KOI8-R?B?98nL1M/SIPfJ08zPws/Lz9c=?= <[email protected]> writes:
> I'm sorry, but I have not found such construction into documentation:
> SELECT tablename FROM tablename;
It's a whole-row variable. These aren't terribly well documented but you
can find descriptions of them in places. It's not standard SQL --- I
think we inherited it from PostQUEL and kept it because functions on
composite types don't work very well without composite variables.
regards, tom lane
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