Re: [8.1.4] Create index on timestamp fails

-----Original Message-----
From: Chris Hoover [mailto:revoohc@gmail.com]
Sent: Tuesday, August 22, 2006 3:02 PM
To: Arturo Perez
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] [8.1.4] Create index on timestamp fails

It appears that 8.1 is stricter on checking the type of function.  Look at your user_tracking function.  It is probably set as volatile.  You need to change it to be immutable.

This should fix the issue.

Chris

On 8/21/06, Arturo Perez <aperez@hayesinc.com> wrote:

Hi all,

Using postgresql 8.1.4....

I have a table with an column:
        entry_date | timestamp with time zone| not null

And when I try to create an index on it like so:
        create index entry_date_idx on user_tracking(date_part('year',entry_date));

I get a
        ERROR: functions in index expression must be marked IMMUTABLE

According to the mailing lists, this has been working since 7.4.  What am I doing wrong?

tia,
arturo