Extracting Hierarchy node values

Greetings,

I am looking for an F/M or ABAP code that would allow me to extract the contents of a hierachy node.

I have a Characteristic - 0GL_ACCOUNT that has hierarchies and I need to be able to extract the contents of a node/sub node in that hierarchy.

The extraction of the contents will help drive a Z delete program to clean up previously loaded data in a datasource.

Thank you