Updating a Catalog Follow the steps below to update an existing catalog. Update a catalog On the DWD Designer, click DWD Solution > Maintenance Tasks. Click Update the Catalog in the Maintenance Tasks screen. Choose from the following options: Remap Composers Remap catalog composers to a new data source Remap Sources and Splitters Remap catalog source object, splitters and decoders to a new data source. Update the Catalog Update the catalog with modified data source metadata. Update Composers Update the catalog composers. Update Data Mart Tables Update the datamart tables. Update Datatypes Update the column datatypes for the entire solution based on a data source system. Click Next. If you want to remap, select a data mart system to update. If you want to update, specify update options. Click Finish and Close.