Number of input and output field

Number of input field	:	One
Number of output field	:	One

This transformation function is used to look up data in a reference file using a single reference field. It is applicable when the reference data can fit into the memory of each worker. If the reference data is too large, it is recommended to use a reduce-side join assembly instead.

The parameters of this transformation function are:

• Reference File
  The name of the reference file.
• Index of Ref. Field
  The index of the field in the reference file that will be matched against the input value. The default value is 0.
• Field Splitter
  The delimiter used to split each row of the reference file into fields. The default delimiter is a comma (,).
• Index of Output Fields
  The indices of the fields in the reference file whose values will be transferred to the output stream. For example, 1-2-4 means that fields 1, 2, and 4 will be included in the output.