Change Data Capture Developer Guide

Change Data Capture
Keep Your External Data Current with Change Data Capture
Change Event Message Structure
Merged Change Events
Other Types of Change Events: Gap and Overflow Events
Subscribe to Change Events
Change Event Storage and Delivery
Subscription Channels
Compose Streams of Change Data Capture Notifications with Custom Channels
Example Diagrams for Channels and Channel Members
High-Level Replication Steps
Subscribe with CometD Using the EMP Connector Sample
Enrich Change Events with Extra Fields When Subscribed with CometD
Subscribe with Apex Triggers
Change Event Triggers
Apex Trigger Quick Start
Prerequisites
Add an Apex Trigger
Apex Trigger Example
Test Change Event Triggers
Change Event Trigger Considerations
Obtain Apex Trigger Subscribers
Monitor Change Event Publishing and Delivery Usage
Security Considerations
Change Event Considerations
Standard Object Notes
Change Events for Fields
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Prerequisites

Before subscribing to change events with an Apex trigger, set up debug logs and select the Account object for notifications.

Set Up Debug Logs

To obtain debug logs for change event trigger execution, set up debug logs for the Automated Process entity.

  1. From Setup, enter Debug Logs in the Quick Find box, then select Debug Logs.
  2. Click New.
  3. For Traced Entity Type, select Automated Process.
  4. Select the time period to collect logs for and the debug level.
  5. Click Save.

Enable Change Notifications for the Object

On the Change Data Capture page in Setup, enable change notifications for the Account object. See Select Objects for Change Notifications in the User Interface.