set.md

applies_to
serverless stack ga preview =9.1, ga 9.2+

Set processor [streams-set-processor]

Use the Set processor to assign a specific value to a field, creating the field if it doesn’t exist or overwriting its value if it does.

To use a set processor:

1. Select Create → Create processor.
2. Select Set from the Processor menu.
3. Set Source Field to the field you want to insert, upsert, or update.
4. Set Value to the value you want the source field to be set to.

This functionality uses the {{es}} Set processor internally, but you configure it in Streamlang. Streamlang doesn’t always have 1:1 parity with the ingest processor options and behavior. Refer to Processor limitations and inconsistencies.