I'm building out an application that has the requirement to take in CSV files, map them to columns in a database table, then load the rows. This seems easy to do in the APEX Data Loader pre-21.1, but I can't seem to replicate this functionality with the new version of APEX Data Loader.
The issue is that the CSVs we will be receiving have all different columns from one another, and may not repeat. Previously, the tool allowed end users to map CSV columns to database columns, and that's the functionality I'm looking for.
Within the Data Load Definitions, APEX doesn't appear to allow you to create legacy load definitions, so I can't even use the legacy features. How would I achieve this same functionality?