On 8.11.2014 15:40, Katharina Büchse wrote:
> I'm sorry if I repeated myself too often, I somehow started answering
> at the end of your mail and then went up... I promise to do this
> better next time.
Nah, no problem. Better say something twice than not at all ;-)
However, I see you've responde
On 7.11.2014 13:19, Katharina Büchse wrote:
> On 06.11.2014 11:56, Tomas Vondra wrote:
>> Dne 6 Listopad 2014, 11:15, Katharina Büchse napsal(a):
>>>
>>> because correlations might occur only in parts of the data. In this case
>>> a histogram based on a sample of the whole table might not get the p
Ahoj ;-)
On 06.11.2014 11:56, Tomas Vondra wrote:
Hi,
Dne 6 Listopad 2014, 11:15, Katharina Büchse napsal(a):
Hi,
I'm a phd-student at the university of Jena, Thüringen, Germany, in the
field of data bases, more accurate query optimization.
I want to implement a system in PostgreSQL that dete
Dne 6 Listopad 2014, 12:05, Gavin Flower napsal(a):
> On 06/11/14 23:57, Tomas Vondra wrote:
>> Dne 6 Listopad 2014, 11:50, Gavin Flower napsal(a):
>>> Could you store a 2 dimensional histogram in a one dimensional array:
>>> A[z] = value, where z = col * rowSize + row (zero starting index)?
>> How
On 06/11/14 23:57, Tomas Vondra wrote:
Dne 6 Listopad 2014, 11:50, Gavin Flower napsal(a):
Could you store a 2 dimensional histogram in a one dimensional array:
A[z] = value, where z = col * rowSize + row (zero starting index)?
How would that work for columns with different data types?
Tomas
Dne 6 Listopad 2014, 11:50, Gavin Flower napsal(a):
>
> Could you store a 2 dimensional histogram in a one dimensional array:
> A[z] = value, where z = col * rowSize + row (zero starting index)?
How would that work for columns with different data types?
Tomas
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Hi,
Dne 6 Listopad 2014, 11:15, Katharina Büchse napsal(a):
> Hi,
>
> I'm a phd-student at the university of Jena, Thüringen, Germany, in the
> field of data bases, more accurate query optimization.
> I want to implement a system in PostgreSQL that detects column
> correlations and creates statist
On 06/11/14 23:15, Katharina Büchse wrote:
Hi,
I'm a phd-student at the university of Jena, Thüringen, Germany, in
the field of data bases, more accurate query optimization.
I want to implement a system in PostgreSQL that detects column
correlations and creates statistical data about correlate
Hi,
I'm a phd-student at the university of Jena, Thüringen, Germany, in the
field of data bases, more accurate query optimization.
I want to implement a system in PostgreSQL that detects column
correlations and creates statistical data about correlated columns for
the optimizer. Therefore I ne
