16.1.1.2 Data Versioning in Mappers

Data Versioning supports different versions of the Mapper data. For the Data Versioning in Mappers, the following actions must be performed:

· History tables for each mapper tables are introduced to store the Mapper data versioning for each MIS date.

· For given MIS date during the Run execution, the mapper history tables are populated from the available Mapper tables that are maintained through the UI and then the Fact table data is populated.

· For a backdated execution, if the Mapper data is already available for that prior date, the generation of the history Mappers is restricted.

· Mappers enhanced Fact T2Ts use the history Mappers as the base instead of the MIS date.