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 Planned for future release
Components Q Replication for Z
Created by Guest
Created on Mar 5, 2019

Q-Replication Apply program shall be able to recognize if a column-organized table contains already a dictionary



the current implementation of the Q-Replication apply program for an automatic LOAD operation on column-organized target tables does not recognize if a dictionary already exist.

A column compression dictionary is used to compress data in a column of a column-organized table.

When you load data into a column-organized table, the first phase is the analyze phase, which is unique to column-organized tables.

The analyze phase occurs only if column compression dictionaries must be built, which happens during a LOAD REPLACE operation, a LOAD REPLACE RESETDICTIONARY operation, a LOAD REPLACE RESETDICTIONARYONLY operation, or a LOAD INSERT operation (if the column-organized table is empty). The load utility analyzes the input data to determine the best encoding schemes for building column compression dictionaries.


However an automatic LOAD on column-organized target tables performed by the Q-Replicaton apply program started always the analyze phase and it seems that the apply prgram use the LOAD REPLACE RESETDICTIONARY option for each full refresh.

That doube the time for a new full refresh even if there a dictionary already in place.

The apply program shall be able to recognize if there dictionary in place in order to avoid a new analyze phase.

This option shall be configureable for each subscription, e.g. specify a flag which indicate to to a new LOAD with a LOAD REPLACE RESETDICTIONARY operation.