Communities
A collaborative platform to connect and grow with like-minded Informaticans across the globe
Product Communities
Connect and collaborate with Informatica experts and champions
Discussions
Have a question? Start a Discussion and get immediate answers you are looking for
User Groups
Customer-organized groups that meet online and in-person. Join today to network, share ideas, and get tips on how to get the most out of Informatica
Get Started
Community Guidelines
Knowledge Center
Troubleshooting documents, product guides, how to videos, best practices, and more
Knowledge Base
One-stop self-service portal for solutions, FAQs, Whitepapers, How Tos, Videos, and more
Support TV
Video channel for step-by-step instructions to use our products, best practices, troubleshooting tips, and much more
Documentation
Information library of the latest product documents
Velocity (Best Practices)
Best practices and use cases from the Implementation team
Learn
Rich resources to help you leverage full capabilities of our products
Trainings
Role-based training programs for the best ROI
Certifications
Get certified on Informatica products. Free, Foundation, or Professional
Product Learning Paths
Free and unlimited modules based on your expertise level and journey
Resources
Library of content to help you leverage the best of Informatica products
Tech Tuesdays Webinars
Most popular webinars on product architecture, best practices, and more
Product Availability Matrix
Product Availability Matrix statements of Informatica products
SupportFlash
Monthly support newsletter
Support Documents
Informatica Support Guide and Statements, Quick Start Guides, and Cloud Product Description Schedule
Product Lifecycle
End of Life statements of Informatica products
Ideas
Events
Change Request Tracking
Marketplace
English
  • PowerExchange for CDC and Mainframe 10.0
  • All Products

Table of Contents

Search

  1. Preface
  2. Part 1: PowerExchange CDC Introduction
  3. Part 2: PowerExchange CDC Components
  4. Part 3: PowerExchange CDC Data Sources
  5. Part 4: Change Data Extraction
  6. Part 5: Monitoring and Tuning
  7. Appendix A: DTL__CAPXTIMESTAMP Time Stamps

CDC Guide for Linux, UNIX, and Windows

CDC Guide for Linux, UNIX, and Windows

Back Next

Changing a Source Table Definition Used in Oracle LogMiner CDC

Changing a Source Table Definition Used in Oracle LogMiner CDC

Occasionally, you might need to change the definition of an Oracle source table that is registered for change data capture.
If your table definition changes affect the columns from which change data is captured, complete this procedure to enable PowerExchange to switch to the updated table definition, while preserving access to previously captured data. These table definition changes include adding, altering, or dropping columns. You do not need to perform this procedure if you are selectively capturing change data for a subset of columns and none of the selected columns are affected by the table definition changes.
If you no longer need to capture change data from a column in a table, you can remove that column from the extraction map without changing the capture registration. Change data for the column is still captured but is not extracted.
  1. Stop DELETE, INSERT, and UPDATE activity against the table.
  2. Verify that any change data that was captured under the previous table definition has completed extraction processing. Then stop all workflows that extract change data for the table.
  3. In the PowerExchange Navigator, open the original capture registration and set its status to
    History
    .
    PowerExchange does not capture change data based on capture registrations that have a status of
    History
     or
    Inactive
    .
  4. Drop the supplemental log group for the table.
  5. Use DDL to make the table changes.
  6. In the PowerExchange Navigator, create a new capture registration that reflects the metadata changes.
    When creating the registration, specify these settings:
    • Set the capture registration
      Status
       to
      Active
      .
    • Select the
      Execute DDL now
       option so that when you finish the capture registration, the PowerExchange Navigator runs DDL for creating a new supplemental log group.
    PowerExchange uses the newly activated capture registration for change data capture.
  7. Change the target table definition to reflect the source table metadata changes, if necessary.
  8. If you use the PowerExchange Logger for Linux, UNIX, and Windows, restart the PowerExchange Logger process so that it will begin using the new capture registration.
  9. In PowerCenter Designer, import the altered source and target tables. Edit the mapping if necessary.
  10. If necessary, rematerialize the target tables. After materialization completes, create new restart tokens.
  11. Re-enable DELETE, INSERT, and UPDATE activity against the table.
  12. Restart extraction processing.
0 COMMENTS
We’d like to hear from you!