ABAP 4 data dictionary describes the logical structures of the objects used in application development and shows how they are mapped to the underlying relationa...
Different types of data dictionary objects:
1) Tables
2) Views
3) Data elements
4) Structure
5) Domains
6) Search Helps
7) Local Objects
8) Matchcode...
The information in the data dictionary validates the existence of the objects, provides access to them, and maps the actual physical storage location....
To perform one of these function on an index,table, or cluster:
To collect statistics about object used by the optimizer and store them in the data dictionary....
