From: ohmy9od@yahoo.com
To: pgsql-sql@postgresql.org
Subject: Issue with plpgsql trigger
Date: 22 Jul 2004 03:17:14 -0700
Message-ID: <ffde43bc.0407220217.2aad1715@posting.google.com> (raw)
I'm only learning this, but I've got a working function that I want to
be invoked in a trigger. The function itself is:
CREATE FUNCTION online_pct_func(integer, interval)
RETURNS boolean AS '
DECLARE
on numeric;
off numeric;
o_pct numeric;
op varchar;
BEGIN
on := 0;
off := 0;
SELECT count(info.online) INTO on
FROM info
WHERE info.id = $1
AND info.online = ''1''
AND info.iso_date_time > (now() - CAST($2 AS interval));
SELECT count(info.online) INTO off
FROM info
WHERE info.id = $1
AND info.online = ''0''
AND info.iso_date_time > (now() - CAST($2 AS interval));
o_pct := (on / (on + off)) * 100.0;
op := ''UPDATE online_pct '';
IF $2 = ''01:00''
THEN op := op || ''SET on1hr = ''
|| o_pct || '', isodt1hr = current_timestamp '';
ELSIF $2 = ''1 day''
THEN op := op || ''SET on1day = ''
|| o_pct || '', isodt1day = current_timestamp '';
ELSIF $2 = ''1 week''
THEN op := op || ''SET on1wk = ''
|| o_pct || '', isodt1wk = current_timestamp '';
ELSIF $2 = ''1 mon''
THEN op := op || ''SET on1mo = ''
|| o_pct || '', isodt1mo = current_timestamp '';
ELSIF $2 = ''1 year''
THEN op := op || ''SET on1yr = ''
|| o_pct || '', isodt1yr = current_timestamp '';
END IF;
op := op || ''WHERE id = '' || $1;
EXECUTE op;
RETURN 1;
END;
' LANGUAGE 'plpgsql';
It gives the intended outcome by itself, for example with select
online_pct_func(1, '1 year');
The trigger I've got, which is not working for me, is as follows:
CREATE FUNCTION online_pct_trig() RETURNS opaque AS '
DECLARE
i1hr timestamp;
i1day timestamp;
i1wk timestamp;
i1mo timestamp;
i1yr timestamp;
oper varchar;
BEGIN
SELECT o.isodt1hr INTO i1hr,
o.isodt1day INTO i1day,
o.isodt1wk INTO i1wk,
o.isodt1mo INTO i1mo,
o.isodt1yr INTO i1yr
FROM online_pct o
WHERE o.id = NEW.id;
oper := ''SELECT online_pct_func(NEW.id, '';
IF i1hr <= (now() - ''00:01''::interval)
THEN oper := oper || ''01:00'' || '');'';
EXECUTE oper;
END IF;
IF i1day < (now() - ''01:00''::interval)
THEN oper := oper || ''1 day'' || '');'';
EXECUTE oper;
END IF;
IF i1wk < (now() = ''1 day''::interval)
THEN oper := oper || ''1 week'' || '');'';
EXECUTE oper;
END IF;
IF i1mo < (now() - ''1 week''::interval)
THEN oper := oper || ''1 mon'' || '');'';
EXECUTE oper;
END IF;
IF il1yr < (now() - ''1 mon''::interval)
THEN oper := oper || ''1 year'' || '');'';
EXECUTE oper;
END IF;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';
CREATE TRIGGER online_pct_trig
AFTER INSERT ON info
FOR EACH ROW EXECUTE PROCEDURE online_pct_trig();
I'm guessing there's an obvious error in there that I can't identify;
but I've gotten nowhere with it on my own. I guess I'm looking for any
input on this..
- Oeln
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: ohmy9od@yahoo.com
Subject: Re: Issue with plpgsql trigger
In-Reply-To: <ffde43bc.0407220217.2aad1715@posting.google.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
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