| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Виктор Вислобоков <corochoone(at)gmail(dot)com> |
| Cc: | PostgreSQL-documentation <pgsql-docs(at)postgresql(dot)org> |
| Subject: | Re: Undocumented trick in SELECT? |
| Date: | 2010-04-04 16:26:17 |
| Message-ID: | 12678.1270398377@sss.pgh.pa.us |
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| Lists: | pgsql-docs |
=?KOI8-R?B?98nL1M/SIPfJ08zPws/Lz9c=?= <corochoone(at)gmail(dot)com> 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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