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  3. October 2005

Re: SQL Optimizer Issue

I don't remember what will do it, but there are characteristics of a statement that will make it come back up to CQE. There is an info APAR - I forget the number, but there should be references to it at www.iseries.ibm.com/db2
More and more kinds of statements are being handled by SQE, the new engine. And this is an area where you MUST be current on the DB2 group PTF.
There was a time when turning on some kind of parallel processing kept things up in CQE, but that is no longer the case. Check the info APAR. And maybe there is some special do-nothing bit you can add to make something use the old engine. 

HTH
Vern

At 03:52 PM 10/20/2005, you wrote:


Hello, all:

I have followed this thread with much interest.

Apparently, the "CQE" is the original query engine on OS/400, and SQE is the
new one?

Is there any way (a simple way?) to control which query engine will be used,
especially for those situations that now run markedly slower than before
upgrading from V5R2 to V5R3.

Thanks.

Mark S. Waterbury



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