From: Andreas Kretschmer <akretschmer@spamfence.net>
To: pgsql-sql@postgresql.org
Subject: Re: Looking for some help with cascading updates...
Date: Tue, 18 Apr 2006 20:49:59 +0200
Message-ID: <20060418184959.GA2576@KanotixBox> (raw)
In-Reply-To: <647d31c20604181144g63b9ecc2t800e4e2d5fa91f0e@mail.gmail.com>
References: <647d31c20604181119m43ba3c7ay3d467dd9446a6fd8@mail.gmail.com>
<20060418183101.GA31339@KanotixBox>
<647d31c20604181144g63b9ecc2t800e4e2d5fa91f0e@mail.gmail.com>
Mark True <darfoo@gmail.com> schrieb:
> I guess I should have clarified. I am having trouble figuring out how to
> construct the IF statement to see if that item exists in the foreign table
> something like:
>
> count=select count(*) from table;
>
> if count=0 {
> insert fkey into myOtherTable
> }
a real example:
(table harz_ufpos references harz_uf)
create or replace function gh_insert(text,int,int,text,int,float) returns int as $$
declare c int;
begin
select into c count(*) from harz_uf where (uf,ab) = ($1,$2);
if c = 0 then
insert into harz_uf (uf,ab,beschreibung,aktiv) values ($1,$2,$4,'t');
end if;
insert into harz_ufpos (uf,pos,anzahl,rest,flaeche) values ($1,$3,$5,$5,$6);
return 1;
end;
$$ language 'plpgsql';
HTH, Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect. (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly." (unknow)
Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°
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Cc: akretschmer@spamfence.net
Subject: Re: Looking for some help with cascading updates...
In-Reply-To: <20060418184959.GA2576@KanotixBox>
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