[SQL] group by not returning sorted rows

[Bret Hughes]

I have a query:



select cities.name as city, buildings.name as building, 
        pagename, 
        log_date , 
        sum(exhibition_count) as tot 
from logrecords 
        join cities on (logrecords.city=cities.num) 
        join buildings on (logrecords.building=buildings.num) 
where   advertiser = 'Nielsens' and 
        log_date >= '01/01/2004' and 
        log_date <= '01/31/2004' 
group by cities.name, buildings.name,pagename,log_date ;

I have migrated a database from a redhat 7.3 box running 
[EMAIL PROTECTED] reports]$ rpm -q postgresql
postgresql-7.2.3-5.73


To a redhat 9 box running :
[EMAIL PROTECTED] reports]$ rpm -q postgresql
postgresql-7.4.2-1PGDG

and the rows resulting from the query are no longer sorted by log date. 
Is this a change since 7.2x?

I can achieve the results I need by adding an order by clause identical
to the group by but this seems counter intuitive since the rows have to
be ordered anyway.

Any tips appreciated.

Bret



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