ommit" contribution.
Regards.
Chaoyong Wang
On Fri, Jan 18, 2013 at 5:26 PM, Heikki Linnakangas wrote:
> On 18.01.2013 11:02, wang chaoyong wrote:
>
>> Hi folks,
>>
>> Currently, I'm trying to read the storage component, since it's
>> biased
&
Hi folks,
Currently, I'm trying to read the storage component, since it's biased
towards the lower layer, seems more difficult to understand and debug. All
the materials I have found are the original papers on
http://db.cs.berkeley.edu, I'm wondering how much it have been changed
since Postgre
日 9:47
To: Wang, Chaoyong
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] problem when optimizing the window aggregation
"Wang, Chaoyong" writes:
> I used the function datumCopy as following:
> peraggstate->transValue = datumCopy(peraggstate->tempTransValue,
>
Hi,
I'm trying to reduce the re-computing of window aggregation. Here the
AVG function for example.
The original window aggregation's transition value(transValue) of AVG is
an ArrayType, that contains two main values(sum, count).
Now, I'm using a temporary transition value (tempTransVa
