Hi,
Any thoughts on why the group sorted has a poorer performance?
No.
Is there a way to override the choices?
No, currently not.
Regards,
Thomas
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Hi Thomas,
Thanks for the answer (I didnt see it at first).
I'm just testing every possible query plans for a study and I have
also an accumulated buffer that can do the trick as well.
Any thoughts on why the group sorted has a poorer performance? Is
there a way to override the choices?
Thanks
Hi,
Large result sets are buffered on disk (in a temporary table or temporary
file).
What you could do is create a separate table where you keep the sum of the
value, plus the count, grouped by id. The table would need to be updated
using a trigger. That way, you don't need to read all rows
Hi,
I'm currently experimenting performance issues with the aggregate operation.
Here is my data : A historic of values for different ids
CREATE TABLE Bench (id INT NOT NULL, value INT NOT NULL, T TIMESTAMP NOT
NULL)
Thereafter I insert a lot of data in it (generated). My parameter for
