Cast

The cast transform function transforms the data to a target compatible schema.

The step name is cast, and the UserConfig is controlled here: {"steps": [{"type": "cast", "schema-type": "STRING"}]}.

Parameters:

Parameter Description

Parameter	Description
schema-type	The target schema type. Only `STRING` is available.
part	when used with KeyValue data, defines if the transform function is done on the `key` or on the `value`. If `null` or absent the transform function applies to both the key and the value.

schema-type

The target schema type. Only STRING is available.

part

when used with KeyValue data, defines if the transform function is done on the key or on the value. If null or absent the transform function applies to both the key and the value.

Example:

Produce an AVRO message with the payload: {field1: value1, field2: value2}:
- AVRO
- Result
{"field1": "value1", "field2": "value2"}
{"field1": "value1", "field2": "value2"}
The function casts the values as a string: {"field1": "value1", "field2": "value2"}.

What’s next?

For more, see Transform Functions or the Pulsar documentation.