Re: Interval to number

Oh :(

I'd given up waiting for a response.
Thanks though Brian ... I currently have the triggered function:

CREATE FUNCTION logSession () RETURNS opaque AS '
    DECLARE
    client_rate    numeric(10,2);
    period         interval;
    to_charge    numeric(10,2);
    BEGIN
        SELECT INTO client_rate rate from clients c where c.id=OLD.client;
        SELECT INTO period max(time) - min(time) FROM convs WHERE
session_id=OLD.id;
        SELECT INTO to_charge (to_number(to_char(period, ''SSSS''), ''99999D99'')
/ 60 * client_rate);

        INSERT INTO previous_sessions SELECT * from current_sessions c WHERE
c.id=OLD.id;
        INSERT INTO logged_convs SELECT * from convs c WHERE c.session_id=OLD.id;

        INSERT INTO session_logs (session_id, time, length, charge, paid) VALUES
(OLD.id,OLD.time,period, to_charge, ''false'');
    RETURN OLD;
    END;'
language 'plpgsql';


So I'll try to build it into that.

-----Original Message-----
From: Brian McCane [mailto:bmccane@mccons.net]
Sent: 20 May 2002 17:35
To: Gareth Kirwan
Cc: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Interval to number



EXTRACT is your friend :)

SELECT EXTRACT(EPOCH FROM max(occurrance) - min(occurrance))::integer ;

- brian

k=# SELECT EXTRACT(EPOCH FROM now() - '2001-01-01') ;
   date_part
----------------
 43583467.94995
(1 row)


On Mon, 20 May 2002, Gareth Kirwan wrote:

>
> Postgres 7.2
> I have an interval selected from a max(occurance) - min(occurance) where
> bla.
> I now want to multiply this by a rate - to create a charge...
>
> If I use to_char( interval, 'SSSS');
> I will get a seconds conversion - but that works on seconds since
midnight -
> hence
> with a one day period.
>
> Are there any better ways of converting a timestamp to an integer?
>
>
> Thanks
>
> Gareth
>
>
>
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