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Creating Internal Tables
Like other elements in the ABAP type concept, you can declare internal tables as abstract data
types in programs or in the ABAP Dictionary, and then use them to define data objects.
Alternatively, you can define them directly as data objects. When you create an internal table as a
data object, you should ensure that only the administration entry which belongs to an internal
table is declared statically. The minimum size of an internal table is 256 bytes. This is important if an
internal table occurs as a component of an aggregated data object, since even empty internal
tables within tables can lead to high memory usage. (In the next functional release, the size of the
table header for an initial table will be reduced to 8 bytes). Unlike all other ABAP data objects, you
do not have to specify the memory required for an internal table. Table rows are added to and
deleted from the table dynamically at runtime by the various statements for adding and deleting
records.
You can create internal tables in different types.
You can create standard internal table and then make it sort in side the program.
The same way you can change to hashed internal tables also.
There will be some performance issues with regard to standard internal tables/ hashed internal
tables/ sorted internal tables.
Like other elements in the ABAP type concept, you can declare internal tables as abstract data
types in programs or in the ABAP Dictionary, and then use them to define data objects.
Alternatively, you can define them directly as data objects. When you create an internal table as a
data object, you should ensure that only the administration entry which belongs to an internal
table is declared statically. The minimum size of an internal table is 256 bytes. This is important if an
internal table occurs as a component of an aggregated data object, since even empty internal
tables within tables can lead to high memory usage. (In the next functional release, the size of the
table header for an initial table will be reduced to 8 bytes). Unlike all other ABAP data objects, you
do not have to specify the memory required for an internal table. Table rows are added to and
deleted from the table dynamically at runtime by the various statements for adding and deleting
records.
You can create internal tables in different types.
You can create standard internal table and then make it sort in side the program.
The same way you can change to hashed internal tables also.
There will be some performance issues with regard to standard internal tables/ hashed internal
tables/ sorted internal tables.
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SAP Introduction
sap abap faq
sap Tables
SAP Transaction codes
Internal tables
data dictionary
performance tuning
transports & Requests
Sap scripts
Smartforms
lsmw
reports
sap Workflow
module pool/ dialog
programming
table control
user exits
sap memory
abap memory
alv reports
ABAP ADVANCED
IDOC
ALE
BAPI
BADI
RFC
FUNCTIONAL SIDE
Materials Management
FICO
Human Resources
BIW / BW / SEM
Free Documentation
Abap Material
Ale Material
BAPI Material
BC Material
IDOC Material
R/3 Database Management
SAP material
RFC
Transport
Sales & Distribution Material
Basic Data and Function
Material
Basis (BC) Material
Billing Material
CA Material
CATT : Computer Aided Test
Tool
Capacity Evaluation and
leveling Material
Capacity Planning Material
Cross Application Material
Countries
Customer Service Material
Enterpise Material
Financial / Controlling (FICO)
Internet Time Sheet
Inspection Material
HR Material
Material Management
Material
Payments Material
Payroll Material
Pension Fund
Production Planning and
Control
Plant Maintenance
Quality Management Material
Real Estate Material
SAP material
Wage Types