[janchorowski]

This depends on the data source used. Some track updateable collections, some have a more "append-only" nature. For instance, tracing a database table using CDC+Debezium will support reacting to all document changes out of the box.

For file sources, we are working on supporting file versioning and integration with S3 native object versioning. Then the simply deleting the file or uploading a new version would be sufficient to trigger re-indexing the affected documents.