MapReduce Input
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The MapReduce Input step defines the key/value pairs for Hadoop input and indicates the injection point of the transformation that receives input from the MapReduce framework.
The rest of the transformation operates on the fields that come from this step.
Step name
Specifies the unique name of the step on the canvas. You can place the step on the canvas multiple times; however, it represents the same step each time.
Key field
The Hadoop input field and data type that represents the MapReduce key.
Value field
The Hadoop input field and data type that represents the MapReduce value.
All fields of this step support metadata injection. You can use it with ETL metadata injection to pass metadata to your transformation at runtime.
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