Change Data Capture Developer Guide

Change Data Capture
Keep Your External Data Current with Change Data Capture
Change Event Message Structure
Subscribe to Change Events
Subscription Channels
Subscribe with CometD Using the EMP Connector Sample
Enrich Change Events When Subscribed with CometD (Pilot)
Subscribe with Apex Triggers
High-Level Replication Steps
Security Considerations
Change Event Considerations
Standard Object Notes
Change Events for Fields
Other Types of Change Events: Gap and Overflow Events
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Subscription Channels

Use the subscription channel that corresponds to the change notifications you want to receive. The channel name is case-sensitive.

Standard Channels

To receive change event notifications on a standard channel, enable the entities for Change Data Capture. For more information, see Select Objects for Change Notifications and Migrate Object Selections with Metadata API and Tooling API. Then subscribe to the appropriate channel.

All Change Events
1/data/ChangeEvents
Standard Object
1/data/<Standard_Object_Name>ChangeEvent
For example, the channel to subscribe to change events for Account records is:
1/data/AccountChangeEvent
Custom Object
1/data/<Custom_Object_Name>__ChangeEvent
For example, the channel to subscribe to change events for Employee__c custom object records is:
1/data/Employee__ChangeEvent

Custom Channel

Entities are automatically enabled for Change Data Capture when you create a custom channel that includes them. A custom channel has the following format.

1/data/YourChannelName__chn
For example, if your channel name is SalesEvents, the subscription channel is:
1/data/SalesEvents__chn

For more information about custom channels, see Compose Streams of Change Data Capture Notifications with Custom Channels.