BC030_2.08.1
ABAP Dictionary Objects:
Views
BC030_2.08.1
ABAP Dictionary Objects:
Views
BC030_2.08.2
Objectives
• The participants will be able to:
– Define a View
– Explain the different Relational
Operations
– Discuss the different types of Views
– Discuss how to use Views in an ABAP
program
BC030_2.08.3
What is a View?
BC030_2.08.4
The Most Basic Form of a View
BC030_2.08.5
Table 2
Selection
View B
View B
Table 1
Projection
View
View
A
A
View C
View C
Join
Table 4
Table 4
Table 3
Table 3
The Relational Operations
BC030_2.08.6
Projection
View A
View A
Table 1
The Projection Operation
BC030_2.08.7
Specifying Projected Fields
BC030_2.08.8
Selection
View B
View B
Table 2
Example:
Staff Level <= 3
The Selection Operation
BC030_2.08.9
Specifying Selection Criteria
1
2
3
4
5
Can include unprojected
fields
BC030_2.08.10
Table
Table
3
3
Join
Table
Table
4
4
View C
View C
The Join Operation
BC030_2.08.11
Salary
Salary
ID
Name
Salary
5579
Smith
$10,000.00
5579
Smith
$11,000.00
5579
Smith
$12,000.00
5579
Smith
$13,000.00
ID
Name Salary 1 Salary 2 Salary 3
…
Employee
Employee
Wrong
The Necessity of the Join
Operation
BC030_2.08.12
ID
Salary
Date Effective
5579
$10,000.00
10/1/91
5579
$11,000.00
10/1/92
5579
$12,000.00
10/1/94
5579
$13,000.00
10/1/96
ID
Name
…
Employee
Employee
Salary
Salary
Right
Understanding the Join
Operation
BC030_2.08.13
View C
View C
Join
Table 4
Table 4
Table 3
Table 3
Primary
Secondary
The Join Operation
and Foreign Keys
BC030_2.08.14
Specifying Joined Fields
Hit the RELATIONSHIPS pushbutton
to automatically generate Join
conditions
Join
Conditions
Indicates the Base Tables
from which the data will
come
BC030_2.08.15
Types of Views in
the ABAP Dictionary
• Database View
• Projection View
• Help View
• Maintenance View
BC030_2.08.16
Database
DB
Database View
The Database View
BC030_2.08.17
View C
Projection View
The Projection View
BC030_2.08.18
Database View
Projection View
Database Vs. Projection Views
BC030_2.08.19
Other Types of Views
• Help View
• Maintenance View
BC030_2.08.20
TABLES: KNA1VV.
SELECT *
FROM
KNA1VV.
WRITE: / KNA1VV-KUNNR,
KNA1VV-VKORG,
KNA1VV-VTWEG,
KNA1VV-SPART.
ENDSELECT.
Using a View in Program Code
BC030_2.08.21
Summary
• The participants should be able to:
– Define a View
– Explain the different Relational Operations
– Discuss the different types of Views
– Discuss how to use Views in an ABAP
program