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mtlrsk 30 posts Joined 06/08
18 Oct 2011
Queryband

How does queryband help in getting skew information ?

I was reading one of the manual and it says that by using substr in queryband , we can get the skew information , can someone shed light on it.?

 

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dnoeth 4628 posts Joined 11/04
18 Oct 2011

I don't know what you mean.
Could you post where you found anything like that in the manuals?

Dieter

Dieter

gryback 271 posts Joined 12/08
18 Oct 2011

I will throw in a guess as to how querybanding and skew could be related. Querybanding is done through a "SET SESSION" or "SET TRANSACTION" statement and provides additional information about that query to Teradata. A common use case would be knowing the user behind an application query. So the relation to skew information may be that I could determine the actual user submitting the query through the application causing the skew versus only knowing the application.

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