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Change Data Capture Developer Guide

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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
Transaction-Based Replication Steps
Subscribe with Pub/Sub API
Get Compound Fields in Change Events
Enrich Change Events with Extra Fields
Filter Your Event Streams
Change Event Filters
Filter Expressions in Channel Members
Subscribe to the Channel and Receive the Filtered Event Stream
Get Custom Channels and Channel Members
Subscribe with Apex Triggers
Monitor Change Event Publishing and Delivery Usage
Security Considerations
Change Event Considerations
Standard Object Notes
Change Events for Fields
PDF

Filter Your Stream of Change Events with Channels

Receive only the change event messages that match a predefined filter on a channel in subscribers. With fewer events delivered to subscribers, event processing is optimized. Also, subscribers make more efficient use of the event delivery allocation. This feature supports Pub/Sub API, CometD (Streaming API), and event relays but not Apex triggers.

If you use Government Cloud and your org was created before January 14, 2022, contact Salesforce to enable this feature. Government Cloud orgs created on or after January 14, 2022 have this feature enabled. This feature is available in all other clouds.

Note