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Focal Point    Focal Point Forums  Hop To Forum Categories  WebFOCUS/FOCUS Forum on Focal Point     [CLOSED]Which will take less time : A computed column or direct database column?

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[CLOSED]Which will take less time : A computed column or direct database column?
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sandy2sagar
Member
posted
Hi,

There is a scenario that I have to used a database column on the report, whereas it can be computed in .fex code too by using other database columns.
Here is my question arise:
Which will take less time : A computed column or direct database column? and Why?

Please suggests me.


Regards,
Sandy Sagar

This message has been edited. Last edited by: <Emily McAllister>,


WebFOCUS 7.6
Windows, All Outputs
 
Posts: 25 | Registered: September 15, 2014Report This Post
Waz
Expert
posted Hide Post
I would think DB column, not knowing all the details of the calc.

You are just pulling the data.


Waz...

Prod:WebFOCUS 7.6.10/8.1.04Upgrade:WebFOCUS 8.2.07OS:LinuxOutputs:HTML, PDF, Excel, PPT
In Focus since 1984
Pity the lost knowledge of an old programmer!

 
Posts: 6347 | Location: 33°49'23.0"S, 151°11'41.0"E | Registered: October 31, 2006Report This Post
Darryl_uk
Silver Member
posted Hide Post
I would propose that if the column is on a table you would otherwise not read then the extra i-o would take longer than a calculation against data you are already getting in your data block. But this would so much depend on whether extra disk access would be required versus data in memory. If this is time critical I would suggest trying both and getting some stats out of the box. (I've had this in oltp systems where the server is performing thousands of tps against stringent performance criteria - then disk access can be a significant performance issue)


7.7.05 Windows.
 
Posts: 39 | Location: UK | Registered: July 11, 2012Report This Post
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