ABAP Dictionary Introduction Tables in the ABAP Dictionary Performance in Table Access Consistency through Input Check Dependencies of ABAP Dictionary Objects Changes to Tables Views Search Helps

Introduction Function of the ABAP Dictionary in the R/3 System Definition of database objects User-defined types Services in the ABAP Dictionary Linking to the development and runtime environments

Function of the ABAP Dictionary

Database Objects in the ABAP Dictionary

Type Definitions in the ABAP Dictionary

Services of the ABAP Dictionary

Linking to the Development and Runtime Environment

Tables in the ABAP Dictionary Two-level domain concept Mapped in the relational database system Technical settings Data class Size category Buffering Logging

Tables and Fields

Basic Objects of the ABAP Dictionary

Two-Level Domain Concept: Example

Transparent Tables and Structures

Include Structures

Technical Settings

Data Class

Size Category

Logging

Performance during Table Access Indexes Primary index and secondary index Structure of an index Data access using an index Table buffering Advantages of buffering Local table buffers Buffering types Buffer synchronization Which tables should be bufferd?

Structure of an Index

Access with Indexes

Data Access using the Buffer

Table Buffering

Full Buffering

Generic Buffering

Single-Record Buffering

Buffer Synchronization 1

Buffer Synchronization 2

Buffer Synchronization 3

Buffer Synchronization 4

Buffer Synchronization 5

Buffer Synchronization 6

Consistency through Input Checks Fixed Values Value table What is a foreign key? Field assignment using the check field Semantic attributes of the foreign key Text table

Fixed Values

Value Table

Inserting a Data Record

Violation of the Foreign Key Check

Foreign Key Fields / Check Fields

Data Consistency through Foreign Keys

Foreign Key Definition in the Check Field

Check Table not Equal to Value Table

Semantic Attributes

Text Table

Dependencies of ABAP Dictionary Objects Activation of ABAP Dictionary objects Handling of dependent objects Where-used list and R/3 Repository Information System as seen by the ABAP Dictionary

Active and Inactive Versions

Runtime Objects

Handling of Dependent Objects

Where-Used Lists

The Repository Information System ABAP Dictionary

Changes to Data base Tables Changes to database tables Effect of changes to the table structure Table conversion Possible problems during conversions Append structures

Changes to Tables

How is the Structure Adjusted?

Conversion Process 1

Conversion Process 2

Conversion Process 3

Conversion Process 4

Conversion Process 5

Possible Problems during Conversions

Resuming Terminated Conversions

Append Structures 1

Append Structures 2

Append Structure 3

Views Why do you need views? Creating a view by join, projection and selection Join conditions and foreign keys Selection of data with views Database views Maintenance views Inner and outer joins

Why do you Need Views?

Structure of View – Starting Situation

Structure of a View – Join Condition

Structure of a View – Field Selection (Projection)

Structure of a View – Selection Condition

How are Tables Linked to Views?

Structure of the View

Data Selection with Views

Database Views

Includes in Database Views

Maintenance Views

Inner and Outer Joins

Search Helps Input help in the R/3 System ABAP Dictionary object search help Selection method of a search help Dialog behavior of a search help Interface of a search help Attaching search helps to fields Collective search helps and elementary search helps Append search helps

R/3 Standard Function: Input Help

Requirements of the Input Help

ABAP Dictionary Object Search Help

Selection Method of a Search Help

Description of the Dialog Behavior

Interface of a Search Help

How do you Use Search Help?

Search Help Attachment in the ABAP Dictionary

Overview: Mechanisms for the Input Help

Performance of the Input Help

Alternative Search Paths

Collective Search Helps and Elementary Search Helps

Append Search Helps