13.5 Using REST APIs in Code

Sometimes your applications need to work with REST APIs in code. Using REST Data Sources is the maximally-declarative approach. In contrast, the MAKE_REST_REQUEST function in the APEX_WEB_SERVICE package provides additional control but requires writing more code.

• Processing REST Source Rows in Code
  Use the APEX_EXEC package to process rows from REST Data Sources programmatically.
• Invoking a REST Operation Programmatically
  You can invoke a REST Data Source operation programmatically, treating it like a function call instead of a row set.
• Calling REST APIs Without a Data Source
  Use the APEX_WEB_SERVICE package to call a REST API that requires a binary payload or returns a binary response. Binary payloads require this approach. You can also use the package for general REST calls, but then you must code many tasks that a REST Data Source handles declaratively.