For rules like Address Validation and Match-Merge, DvSum works on staging tables i.e copy of the original tables. The changes committed back to source will be written on staging table.
Step 1: To create Staging Table, go to Profiling page and select source and table > Show Details
Step 2: Enable Match Merge and enter description, click SAVE.
Step 3: Click on "Generate Script"
Step 4: Run the script on your Datasource to create staging table and then Refresh catalog. This table will start showing on profiling page.
You can profile it and create Address validation rules on it.