Modify operator

The modify operator changes the representation of data before or after it is processed by another operator, or both. Use the modify operator to modify:

• Elements of the record schema of an input data set to the interface required by the by the operator to which it is input
• Elements of an operator's output to those required by the data set that receive the results

The operator performs the following modifications:

• Keeping and dropping fields
• Renaming fields
• Changing a field's data type
• Changing the null attribute of a field

The modify operator has no usage string.