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
Monitor Change Event Publishing and Delivery Usage
Security Considerations
Change Event Considerations
Standard Object Notes
Change Events for Fields
Sending Data Differences for Fields of Updated Records
Change Events for Custom Field Type Conversions
Conversions That Generate a Change Event
Conversions That Generate a Gap Event
Conversions That Don’t Generate Events
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Conversions That Generate a Gap Event

A gap event is generated for all the affected records for some field conversions from Picklist. The change event header of the gap event message contains information about the records, including the record IDs and a change type of GAP_UPDATE.

These field type conversions generate a gap event.

  • Changing a Picklist field to Checkbox
  • Changing a Picklist field to Picklist (Multi-Select)