COBOL uses REDEFINES statements to build the description of one record based on the definition of another record. When you import the COBOL source, the Designer creates a single source that includes REDEFINES.
The REDEFINES statement lets you specify multiple PICTURE clauses for the sample physical data location. Therefore, you need to use Filter transformations to separate the data into the tables created by REDEFINES.
For each REDEFINES:
The Designer creates one target table when you drag the COBOL source definition into the Target Designer.
The Designer creates one primary-foreign key relationship.
The Designer creates a generated key (GK).
You need a separate Filter transformation in the mapping.