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Status Needs more information
Workspace Data Lineage by Manta
Created by Guest
Created on Mar 6, 2025

RELATED IDEAS

How to show data quality shown in column/lineage for special data quality measurement cases?

Your goal is to show the data quality on the lineage, right?  We have a couple "special cases" we're not sure how to handle.

First is related to "virtual tables" (as in IA terminology - I believe they are called something else in IKC).  The Data rule measurements do not connect to the underlying "real" column that is being measured.  Without the virtual table layer, it does connect.  We use virtual tables extensively due to performance reasons.

Second is related to cases where for measurements we load mainframe file contents based on appropriate copybook to our own DB2, and measure the quality from those db tables instead of the mainframe files.  In this case the real target is the file field in the mainframe file on the mainframe, not the db column.  Obviously there is a disconnect and the file field showing in lineage will not have any DQ info attached.

Third would be related to DQ measurements produced with some 3rd party solution - how to incorporate those also into the quality shown on the lineage?  There are cases where our users are unable or unwilling to use IA to measure the quality, so they provide the results in a standard format.

Needed By Quarter
  • Guest
    Reply
    |     Apr 8, 2025

    1) We will use IKC DQ project asset type SQL Query.

    2) UC4 tool is moving mainframe fixed width files to IKC and we use DataStage with copybook to load those files to DB2 so that we can measure DQ of the file content.

    3) This will not fit to our use case. We use Data Rules created in IKC DQ module to measure the quality of the data.

  • Admin
    Yurii Plakhtii
    Reply
    |     Mar 17, 2025

    Hello, I have a few questions for clarification:

    1. Which technology you are using for virtualization of the tables?

    2. Which approach are you using to get mainframe file to the Db2 table?

    Thanks in advance for the answers!

  • Guest
    Reply
    |     Mar 15, 2025

    For the 3rd point please see how IBM DQ component is storing Quality Score by running Metadata Enrichment process.

    You can then check asset via API call GET {service_URL}/v2/assets/{asset_id}?catalog_id={catalog_id}


    You will notice DQ infomation there that's being processed by Knowledge Graph and visualized in the lineage UI

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