Re: Grouping Sets

Paul,

I was able to apply the patch to 9.0.4 and so far looks good. My Oracle
results match. Nice.

But, when trying to calculate some percentages and control some rounding,
the results are coming back as null for some reason. I have tried casting,
to_char, etc to try to get them to show up..no love ensued. I was wondering
if you have any idea what could by happening. I have attached some test
results based on the grouping sets wiki. One of the examples is just using
group by, as a sanity check. Any ideas or help would be much appreciated.

CREATE TABLE cars2 (name CHARACTER VARYING , place CHARACTER VARYING ,
sales real, cost real );

insert into cars2 values('skoda', 'czech rep.', 10000, 8000);
insert into cars2 values('skoda', 'germany', 5000, 6000);
insert into cars2 values('bmw', 'czech rep.', 6000, 4000);
insert into cars2 values('bmw', 'germany', 18000, 15000);
insert into cars2 values('opel', 'czech rep.', 7000, 5000);
insert into cars2 values('opel', 'germany', 7000, 5000);

--grouping sets test--

select name, place,
sum(sales) as sales,
sum(cost) as cost,
sum(cost) / sum(sales) as cost_sales_ratio,
(sum(cost) / sum(sales)) * 100 as cost_sales_ratio_per,
round(((sum(cost) / sum(sales)) * 100),0) as cost_sales_ratio_per_rnd
from cars2 group by rollup(name, place);

name place sales cost cost_sales_ratio cost_sales_ratio_per
cost_sales_ratio_per_rnd
bmw czech rep. 6000 4000 0.6667 (null) (null)
skoda germany 5000 6000 1.2 (null) (null)
opel czech rep. 7000 5000 0.7143 (null) (null)
opel germany 7000 5000 0.7143 (null) (null)
skoda czech rep. 10000 8000 0.8 (null) (null)
bmw germany 18000 15000 0.8333 (null) (null)
bmw (null) 24000 19000 0.7917 (null) (null)
skoda (null) 15000 14000 0.9333 (null) (null)
opel (null) 14000 10000 0.7143 (null) (null)
(null) (null) 53000 43000 0.8113 (null) (null)

--group by sanity test--

select name, place,
sum(sales) as sales,
sum(cost) as cost,
sum(cost) / sum(sales) as cost_sales_ratio,
(sum(cost) / sum(sales)) * 100 as cost_sales_ratio_per,
round(((sum(cost) / sum(sales)) * 100),0) as cost_sales_ratio_per_rnd
from cars2 group by name, place;

name place sales cost cost_sales_ratio cost_sales_ratio_per
cost_sales_ratio_per_rnd
bmw czech rep. 6000 4000 0.6667 66.6667 67
skoda germany 5000 6000 1.2 120 120
opel czech rep. 7000 5000 0.7143 71.4286 71
opel germany 7000 5000 0.7143 71.4286 71
skoda czech rep. 10000 8000 0.8 80 80
bmw germany 18000 15000 0.8333 83.3333 83

Thanks

--
Regards

David

-----Original Message-----
From: Pavel Stehule [mailto:pavel(dot)stehule(at)gmail(dot)com]
Sent: Sunday, September 18, 2011 2:34 PM
To: David Rinaldi
Subject: Re: [HACKERS] Grouping Sets

Hello

A last patch should be applied on 8.4 or 9.0 - should to try it. I
worked with developer version.

http://archives.postgresql.org/pgsql-hackers/2010-08/msg00647.php

Regards

Pavel Stehule

2011/9/18 David Rinaldi <edwbroker(at)gmail(dot)com>:
> Hi,
>
> I tried to apply the Grouping Sets Patch to 8.4, but received several
Hunks
> failed messages, does anyone know if the failing hunks can be applied
> manually?  Or what version they were applied to specifically?
>
> --
> Regards
>
> David
>