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01/23/2006 at 10:12PM PST, ID: 21707676
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5.8

Using Oracle Ref Cursors in Java: Performance Issue

Asked by chetsk in Java Programming Language

Tags: java, oracle, cursor, ref, performance

Hi Experts,
               Desperately seeking answer to this question. Any help would be, needless to say, highly appreciated:

The following is the scenario we have:
1. We have a database schema dedicated to our app.
2. We have another schema (residing on another box) for the Data Warehouse.

We need to query the Data Warehouse. For this we are:

1. creating a database link from the local database schema to the Data Warehouse schema.
2. Executing the queries on the Data Warehouse using the Data base link.

When I get the result of the queries I am storing it in a Ref cursor that is the out parameter of my Stored Procedure. I read that Ref cursor in Java and write the contents to a flat file.

The issue we are facing are:
1. One of the functionality we have should allow us to select a subset of the records from the refcursor. For this, I am inserting the " and rownum < 11" condition while getting my ref cursor.  I expect that this would also be returned to java immediately as I have requested only a subset of the records. However, this is not happening, the Stored Proc runs in 2 mins, however the resulset is obtained in java only after 40 mins.

My question:
1. Is the approach we are using above correct? If no, what is the better approach?

Regards,
Chet
[+][-]01/29/06 11:45 PM, ID: 15821706

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Zone: Java Programming Language
Tags: java, oracle, cursor, ref, performance
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Solution Provided By: oraelbis
Participating Experts: 3
Solution Grade: C
 
 
[+][-]01/24/06 12:00 AM, ID: 15773745

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[+][-]01/24/06 02:29 AM, ID: 15774266

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[+][-]01/24/06 09:05 AM, ID: 15777493

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[+][-]01/29/06 10:42 AM, ID: 15818315

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[+][-]01/29/06 10:49 AM, ID: 15818364

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[+][-]01/29/06 11:17 PM, ID: 15821643

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