Обсуждение: help with function and quotes

Dear Sirs:
Please I am attempting implement a function that update a 
column to current time + X seconds
So the query involved looks like:
update mytable set mytime=now+'X seconds';
Here X is a integer value,
Now I need implement this on my function, But I have problems 
at implement this at quotes, e.g. my function could looks 
like:
CREATE    FUNCTION addtime(integer) RETURNS INTEGER AS '
DECLARE  additional ALIAS FOR $1;
BEGIN update mytable set mytime=now()+''additional seconds'';
END;
'
return 1;
LANGUAGE 'plpgsql';
I know probably this doesn't  works, justly I have doubts 
about how to implement this since I want the funtion takes 
the variable additional , not the string 'additional', What I 
should to consider? I read the documentation on pqsql 
language aboute using quotes but none case is resemblance to 
my case.
Can someone tell me an orientation about this?
Thank you  in advance.
Ernesto


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Ernesto,

> CREATE    FUNCTION addtime(integer) RETURNS INTEGER AS '
> DECLARE
>    additional ALIAS FOR $1;
> BEGIN
>   update mytable set mytime=now()+''additional seconds'';
> END;
> '
> return 1;
> LANGUAGE 'plpgsql';

Please go to techdocs (http://techdocs.postgresql.org/) and read Roberto
Mello's revised PL/pgSQL documentation (Roberto, is this part of the
main docs, yet?).  There's several mistakes in this simple procedure, in
addition to the one you asked about.  Or you could read the first 2-3
chapters of any book on PL/SQL for Oracle.

Then, try this:

CREATE    FUNCTION addtime(integer) RETURNS INTEGER AS '
DECLARE   additional ALIAS FOR $1;
BEGIN  update mytable set mytime=now()+ INTERVAL( to_char(additional,
''9999'') || '' seconds'');
RETURN additional;
END;'
LANGUAGE 'plpgsql';

-Josh
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