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Status Not under consideration
Workspace IBM i
Categories Documentation
Created by Guest
Created on Apr 14, 2022

Document the journal entries for create table and alter table "D CT" and "D CG"

In: https://www.ibm.com/docs/en/i/7.4?topic=information-layouts-variable-length-portion-journal-entries#rzakivarlength__TBLOBJLVL

Section: "Object level (D AC, D CG, D CT, D DC, D DT, D GC, D GO, D GT, D M1, D M2, D M3, D P1, D P2, D P3, D RV, D TC, D TD, D TG, D TQ, F CB, F DM, F MC)"

Currently documented is what table has been removed, created or changed but not the details of the column names, types and length/precision/scale


I believe the information I require is in the section: Relative Offset 185 Internal data Char(*) Internal system information

We require this information to correctly decode the journal entries for added data "R PT" or "R PX"

Currently we query the data structure using the system tables but these might no longer match the structure for the journal entries

Idea priority Medium
  • Guest
    May 13, 2022

    Is there any way this could be reconsidered, please?

    We are creating a Kafka CDC connector and this information is vital to make sure we correctly interpret the data in the journal. Using the system catalog on an ad hoc basis is not the most reliable approach.

    If documenting the internal data structure is not palatable, could you perhaps provide a new API or SQL Service that provides an interface to the data instead?

  • Guest
    May 12, 2022
    IBM does not intend to provide a solution to this request at this time, so it is being closed.

    The internal data information is not structured in a way that makes it possible to document. It is a very complex internal structure used for defining a file, and could be modified, extended, or overloaded in the future.

    Db2 for i database team
    IBM Power Systems Development