Hi all,
I must apologise as it turns out the 'culprit' wasn't really pl/pgsql.
The test box I was testing on is Mandrake Linux 7.2, which comes with
PostgreSQL 7.0.2. Everything else has version 7.0.3 installed on it,
and I naively assumed that 7.0.3 was installed on the test box.
After installing the Postgres 7.0.3 rpms from the PostgreSQL site,
pl/pgsql is working consistently again. It looks like the rpms for
PostgreSQL supplied with Mandrake Linux 7.2 are broken, I guess they
didn't run the supplied tests before packaging. :-(
Regards and best wishes,
Justin Clift
Database Administrator
Justin Clift wrote:
>
> Hi all,
>
> I'm having trouble with what MAY BE a bug in PL/PGSQL for PG 7.0.3 on
> Linux (Mandrake Linux 7.2).
>
> It appears pl/pgsql is munging values. When I pass it a 'time' value,
> the value is altered without my code touching it. This is evidenced by
> the stripped down function below :
>
> CREATE FUNCTION which_block(time)
> RETURNS time
> AS 'DECLARE
>
> /* Given a time, this function works out the name of the correct field
> in the reservations table for it
> * Written by : Justin Clift
> * Date : 1st February 2001
> * Version : 1.00
> */
> hours char(3);
> minutes char(2);
> result char(5);
> tempres char(5);
> curnow datetime;
>
> BEGIN
>
> RETURN $1;
> END;'
> LANGUAGE 'plpgsql';
>
> foobar=# select which_block(time '12:40:00');
> which_block
> -------------
> 12:39:00
> (1 row)
>
> foobar=#
>
> Having passed it the time value of '12:40:00', I am immediately
> returning that value and it is no longer '12:40:00'.
>
> Being over 1 month into using PostgreSQL 7.0.3 for a particular project,
> this is scaring me as I'm now doubting the reliability of things.
>
> Regards and best wishes,
>
> Justin Clift
> Database Administrator
