Schema Mapping

Schema Mapping

Description The Schema Mapping transform maps fields from an incoming stream over a specified Schema Definition. The result of this transform is an output stream that conforms to the mapped Schema Definition	Supported Engines Hop Engine Spark Flink Dataflow
Hop Engine
Spark
Flink
Dataflow

Schema mapping is a useful mapping transform to precede transforms like Text File Output or Excel Writer when we decide to refer to a Schema Definition to map the output layout of the file. By preceding these transforms with the Schema Mapping, the incoming stream will be already setup according to the expected output layout definition.

Options

Option	Description
Schema Definition	Name of the Schema Definition that we are going to map to the incoming stream.
Schema Fields	The set of schema fields that are mapped to stream fields.
Stream Fields name	The set of stream fields that are mapped to schema fields.

• Use Get fields button to fill in the available fields from the incoming stream.

• Use the Mapping button to show a Mapping Dialog that will support the mapping process between the stream’s fields and the schema fields.