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Indexing cached tables

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raghubegur

Posted: Tue Apr 04, 2006 6:01 am Post subject: Indexing cached tables

Apprentice

Joined: 15 Jul 2002
Posts: 45

Hi,

I have a message flow that does a look up on a db2 table for every message it processes. The number of look up's may vary from 6 to 600.
The table contains 500 rows and is indexed in db2.

To avoid multiple reads from the database, I have cached the look up table into broker memory. But I do not have index built into the table available in memory. This seems to be proving expensive.

Is there a way to put an index on the table in memory ?

Thanks.
_________________
Cheers
Raghu

wschutz

Posted: Tue Apr 04, 2006 6:08 am Post subject:

Jedi Knight

Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)

What version of broker? V6 has new "shared" variables that can hold ROWS.... or you can use supportpac IA91 for V5 and V6.
_________________
-wayne

raghubegur

Posted: Tue Apr 04, 2006 6:26 am Post subject:

Apprentice

Joined: 15 Jul 2002
Posts: 45

Hi,

Sorry I forgot to mention the version.
It is WBIMB 6.0 on AIX. No fixpack / CSD.

I am using a 'shared' row variable.

It is working fine. The issue is one of 'indexing'.

Thanks.
_________________
Cheers
Raghu

jefflowrey

Posted: Tue Apr 04, 2006 6:33 am Post subject:

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

Well.

You could create another shared row variable that contained references to each of the entries in the main row. Then you can do a select from that row variable to get the reference and then use that to access the data.

BUT, it may not be possible to include references in shared variables. I know it is not possible to share references directly.
_________________
I am *not* the model of the modern major general.

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