Re: ODP / SQL Question.

[DAsmussen@xxxxxxx]

Tim,

In a message dated 1/29/01 5:41:06 PM Eastern Standard Time, 
thatzenbeler@clinitech.net writes:

<<snip>>
> So I looked at it, and it happens to be a RPGSQL function, and it does a lot 
> of interactive indexing.  So my questions is this.  Can I created a logical 
> file similar to this SQL, and index it the same.  So when this sql is 
> activated it would be smart enough to use an already created index instead 
> of creating one from scratch on the fly?  And if so, is there anything 
> special I need to do to attach the logical to the job?



You _CAN_ create a logical similar to the SQL statement in question and it 
_MAY_ improve performance.  You actually have two better options, though:

First, run the program under STRDBG.  Debug throws many entries into the 
joblog that provide additional information about access path creation.  View 
the messages with F1 to provide full information.

Second, use the STRDBMON command against a job running the program to an 
outfile with *DETAIL.  Then query the outfile looking for anything with the 
"Index advised" (QQIDXA?) flag set to "Y" and create those indexes.  You may 
need to do a "follow up" DBMON if performance is still slow, as the optimizer 
isn't always accurate and creating advised indexes sometimes points out the 
_REAL_ index you need.

HTH,

Dean Asmussen
Enterprise Systems Consulting, Inc.
Fuquay-Varina, NC  USA
E-mail:  DAsmussen@aol.com

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