Internal Tables

[Arthur Wang]

What are ‘Internal Tables’?

‘Internal Tables’ are standard data type objects which exist only during the Runtime of an ABAP/4 program. They are used to perform table calculations on subsets of database tables and for re-organizing the contents of database tables according to a user’s need. Internal tables fulfil the need for arrays in ABAP/4.

There are three types of internal tables:

– Standard Tables with a ‘linear’ index. The key is always ‘non-unique.’
– Sorted Tables with either a ‘unique’ or ‘non-unique’ key.
– Hashed Tables (they do not have a linear index) with the key defined always as ‘unique.’

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