From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
---|---|
To: | Bruce Momjian <bruce(at)momjian(dot)us> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Guillaume Lelarge <guillaume(at)lelarge(dot)info>, Neil Conway <neilc(at)samurai(dot)com>, pgsql-docs(at)postgresql(dot)org |
Subject: | Re: Two fixes for plpgsql.sgml |
Date: | 2007-11-28 21:40:36 |
Message-ID: | 20071128214036.GW5118@alvh.no-ip.org |
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Thread: | |
Lists: | pgsql-docs |
Bruce Momjian wrote:
> --- 132,142 ----
> </para>
>
> <para>
> ! <application>PL/pgSQL</> functions can also be declared to return a
> ! group of values, either as a single row, or a group of rows, like a
> ! table. Such a function generates its output by executing
> ! <command>RETURN NEXT</> for each desired element of the result set,
> ! or by using <command>RETURN QUERY</> to output the result of
> evaluating a query.
> </para>
Hmm, ISTM the correct terminology is "set of rows". I have never heard
of "a group of rows". It seems to me the easiest way out of the problem
would have been substituting the commas in the original with parens:
<application>PL/pgSQL</> functions can also be declared to return
a <quote>set</> (or <quote>table</>) of any data type they can return a single
instance of.
The point of "any datatype they can return a single instance of" is that
this can be a set of scalar values (e.g. "RETURNS SETOF int") or of a
complex type ("RETURNS SETOF table"), or anything else they can return a
single instance of :-P (SETOF anyelement? SETOF table%TYPE?)
--
Alvaro Herrera http://www.PlanetPostgreSQL.org/
"World domination is proceeding according to plan" (Andrew Morton)
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