Unwrap KeyValue

If the record value is a KeyValue, the unwrap-key-value transform function extracts the KeyValue’s key or value and makes it the record value.
The step name is unwrap-key-value, and the UserConfig is controlled here: {"steps": [{"type": "unwrap-key-value"}]}.

Parameters:

Parameter Description

Parameter	Description
unwrapKey	By default, the KeyValue’s value is unwrapped. Set this parameter to `true` to unwrap the key instead.

unwrapKey

By default, the KeyValue’s value is unwrapped. Set this parameter to true to unwrap the key instead.

Example

Produce an AVRO message with the payload: {key={keyField: key}, value={valueField: value}}.
- AVRO
- Result
{key={keyField: key}, value={valueField: value}}
{"valueField": "value"}
The function extracts the KeyValue’s key and outputs {valueField: value} to the output topic.

What’s next?

For more, see Transform Functions or the Pulsar documentation.