You may have to use a combination of the automated and manual mapping methods. For example, assume that you have a VSAM file containing a single record type that you want to convert to a single DB2® table.
Typically, you will use the automated mapping method in this case. During the initial data migration phase, you discover that one or more fields in VSAM file contain inconsistent data values that are causing data exception conditions. You decide to write an FBE to identify and correct the inconsistent values. You use the manual mapping method to update the mapping and specify the FBE. Any time you make a change to mapping information, you must generate the driver modules for the file to enable the changes to take effect. You use the manual mapping method to generate the driver modules.
The automated mapping facility does not provide the capability to view the mapping. Always use the manual mapping method to view or change mapping.
Use the manual mapping method in all cases where you are migrating a VSAM file to multiple DB2 tables.