pg.ddx.io pgsql-sql@postgresql.org mailing list archive
help / color / mirror / Atom feedassign the row count of a query to a variable
3+ messages / 3 participants
[nested] [flat]
* assign the row count of a query to a variable
@ 2005-01-14 20:43 Kevin B. <db@ke5in.com>
2005-01-14 21:13 ` Re: assign the row count of a query to a variable PFC <lists@boutiquenumerique.com>
2005-01-14 21:15 ` Re: assign the row count of a query to a variable Michael Fuhr <mike@fuhr.org>
0 siblings, 2 replies; 3+ messages in thread
From: Kevin B. @ 2005-01-14 20:43 UTC (permalink / raw)
To: pgsql-sql
Hi,
I'm trying to assign the row count of a query to a variable in a function
but I'm not having any luck.
Could someone tell me the syntax? I've been looking in the docs and
googling for a long time but just can't find the answer.
I've tried:
CREATE OR REPLACE FUNCTION ret1() RETURNS int4 AS '
BEGIN
declare
var int4;
begin
--select var count(*) from T;
--select var (count(*)) from T;
--select var = count(*) from T;
var = select count(*) from T;
return var;
END;
END;
'
LANGUAGE 'plpgsql';
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: assign the row count of a query to a variable
2005-01-14 20:43 assign the row count of a query to a variable Kevin B. <db@ke5in.com>
@ 2005-01-14 21:13 ` PFC <lists@boutiquenumerique.com>
1 sibling, 0 replies; 3+ messages in thread
From: PFC @ 2005-01-14 21:13 UTC (permalink / raw)
To: db@ke5in.com; pgsql-sql
var := count(*) from T;
or :
SELECT INTO var count(*) from T;
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: assign the row count of a query to a variable
2005-01-14 20:43 assign the row count of a query to a variable Kevin B. <db@ke5in.com>
@ 2005-01-14 21:15 ` Michael Fuhr <mike@fuhr.org>
1 sibling, 0 replies; 3+ messages in thread
From: Michael Fuhr @ 2005-01-14 21:15 UTC (permalink / raw)
To: Kevin B. <db@ke5in.com>; +Cc: pgsql-sql
On Fri, Jan 14, 2005 at 03:43:04PM -0500, Kevin B. wrote:
> I'm trying to assign the row count of a query to a variable in a function
> but I'm not having any luck.
Please be more specific than "not having any luck." What are you
expecting to happen and what actually does happen?
> Could someone tell me the syntax? I've been looking in the docs and
> googling for a long time but just can't find the answer.
See the "Basic Statements" and "Expressions" sections of the PL/pgSQL
documentation. Either of the following should work:
var := count(*) FROM T;
SELECT INTO var count(*) FROM T;
--
Michael Fuhr
http://www.fuhr.org/~mfuhr/
^ permalink raw reply [nested|flat] 3+ messages in thread
end of thread, other threads:[~2005-01-14 21:15 UTC | newest]
Thread overview: 3+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2005-01-14 20:43 assign the row count of a query to a variable Kevin B. <db@ke5in.com>
2005-01-14 21:13 ` PFC <lists@boutiquenumerique.com>
2005-01-14 21:15 ` Michael Fuhr <mike@fuhr.org>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox