Skip to Main Content
IBM Data and AI Ideas Portal for Customers

This portal is to open public enhancement requests against products and services offered by the IBM Data & AI organization. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (

Shape the future of IBM!

We invite you to shape the future of IBM, including product roadmaps, by submitting ideas that matter to you the most. Here's how it works:

Search existing ideas

Start by searching and reviewing ideas and requests to enhance a product or service. Take a look at ideas others have posted, and add a comment, vote, or subscribe to updates on them if they matter to you. If you can't find what you are looking for,

Post your ideas

Post ideas and requests to enhance a product or service. Take a look at ideas others have posted and upvote them if they matter to you,

  1. Post an idea

  2. Upvote ideas that matter most to you

  3. Get feedback from the IBM team to refine your idea

Specific links you will want to bookmark for future use

Welcome to the IBM Ideas Portal ( - Use this site to find out additional information and details about the IBM Ideas process and statuses.

IBM Unified Ideas Portal ( - Use this site to view all of your ideas, create new ideas for any IBM product, or search for ideas across all of IBM. - Use this email to suggest enhancements to the Ideas process or request help from IBM for submitting your Ideas.

IBM Employees should enter Ideas at

Status Not under consideration
Created by Guest
Created on Oct 30, 2019

OQWT in DSM for Z/OS Query Advisor Enhancement needed

Query Advisor missing obvious SQL predicate datatype inconsistency

While researching a production issue in all our production systems with a remote DB2 program, we ran OQT in DSM and found that the QUERY ADVISOR was missing a very obvious and key SQL problem. A column that is defined with a CHAR datatype was being compared to a literal with NO Quotes that was all numerics. Although the Optimizer will convert it using a CAST function, it avoids the optimal use of an existing index that this column is a part of. We ended up finding it ourselves by looking at the formatted query that the tool created, but it should have showed up as a warning for us to review. I am attaching the full recommendation report that OQWT generated from our BOST production region. We are At DB2 V12 R100 . Running DSM Version 2.1 Release, Build 20190702_1507 . this is the solution that was sent to the developers (this recommendation resulted in a 99% reduction in CPU and I/O):

The SQL in APOIMP18 and APOIMP16 is listed below.

The SQLs in these programs have a WHERE clause coded: AND BATCH_PROC_D = 20191024 BATCH_PROC_D is a character column.

The SQL needs to be coded as AND BATCH_PROC_D = ‘20191024’ (put in quotes)


From IBM support:     Looking for an enhancement to analyze the BEFORE stage query text to detect if there is a CAST function in one side and other side in predicate is a value, then show a warning in our Query Advisor recommendation.


reference CASE TS002923553

Needed by Date Nov 29, 2019
  • Guest
    Oct 9, 2020
    Being evaluated at this time.