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Thread: help with sintaxis of quotes on function

help with sintaxis of quotes on function

From
"Ernesto Freyre"
Date:
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
 
 
 

Re: help with sintaxis of quotes on function

From
Stephan Szabo
Date:
On Wed, 7 Nov 2001, Ernesto Freyre wrote:

> 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';

This may work as the update:

update mytable set mytime=now()+CAST((additional || '' seconds'')AS INTERVAL);