During the extraction job, all the data stores that have data elements with a data masking routine associated with them will be automatically masked.
The Data Subsetting process manages all types of data stores processed by Data Builder with the following exceptions:
In these two cases, before creating the extraction method, you must specify a sequential unload of the files and insert the Process Identifier for reading the files, as described in the section Specifying Unload Files for DL/I and DB2 Direct Access Files in the chapter Data Subset Extraction Creation in the Data Subset Extraction Guide.