28-06-2012, 01:23 PM
The Data Dictionary
The Data Dictionary.ppt (Size: 539.5 KB / Downloads: 27)
ABAP Dictionary Concepts
The ABAP dictionary describes the logical structure of the objects used in application development and shows how they are mapped to the underlying relational database in tables or views.
3 Levels of the Dictionary
Tables or structures
Composed of one or more fields
Data elements
Each field refers to a data element that describes the meaning of the field
Domain
Determines the technical properties of the field
Data type and size (including number of decimal places)
Allowed data values
Output characteristics
Data Elements & Domains
The domain is the central object for describing the technical characteristics of an attribute of a business object. It describes the value range of a field. This is determined by specifying formal characteristics such as external format, length and so on.In addition specifying fixed values or a value table can restrict the value range.
The data element is the semantic attribute for fields/domain. It
Defines exactly one role of a domain in a particular business context for its dependent fields.It describes the technical attributes and the meaning of the table field.It also contains the semantic information of a field. Semantic information includes field labels for displaying
Viewing the Contents of a Database Table
From the
Data dictionary
Click on the table radio button & enter the table name
From the dictionary table: table/structure: display fields screen choose utilities…table contents
Data browser (from main menu item overview)
Enter the table name
Choose table…table contents or press enter
Fill in the appropriate selection screen entries
Click on the execute icon on the application toolbar, (or press F8)