SAP/R3 Development workbench
Data Dictionary
• R/3 table types:
– Transparent tables
• Each table definition in DDIC has
an underlying physical table of same
name.
• Used to hold application data eg
Vendor master data
– Pooled and cluster tables
• Can have many table definitions in
DDIC but only one underlying
physical database of a different
name, different fields.
• Used to hold system data such as
configuration data, historical and
statistical data.
SAP/R3 Development workbench
Data Dictionary
Field (Lifnr)
Data Element
(Lifnr)
Semantic
Descriptions
Domain
(Lifnr)
Technical
Descriptions
SAP/R3 Development workbench
Data Dictionary
• Approaches for creating tables
– Bottom-up
• Create domains first, then data
elements then the table.
• Easier to understand for the novice
• Quickly becomes cumbersome
– Top-down
• Create table first, then forward
navigate to create data elements and
domains.
• Much easier to use