SAP ABAP Data Element VIKEYFLAG (Flag for field belonging to key area)
Hierarchy
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SAP_BASIS (Software Component) SAP Basis Component
⤷
BC-DWB-DIC-AC (Application Component) Activation Program, Conversion Program, DB Utility, MC, SPDD
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SDVI (Package) ABAP/4 Dictionary: Views, Lock Objects
SAP_BASIS (Software Component) SAP Basis Component⤷
BC-DWB-DIC-AC (Application Component) Activation Program, Conversion Program, DB Utility, MC, SPDD⤷
SDVI (Package) ABAP/4 Dictionary: Views, Lock Objects
Basic Data
| Data Element | VIKEYFLAG |
| Short Description | Flag for field belonging to key area |
Data Type
| Category of Dictionary Type | D | Domain |
| Type of Object Referenced | No Information | |
| Domain / Name of Reference Type | KEYFLAG | |
| Data Type | CHAR | Character String |
| Length | 1 | |
| Decimal Places | 0 | |
| Output Length | 1 | |
| Value Table |
Further Characteristics
| Search Help: Name | ||
| Search Help: Parameters | ||
| Parameter ID | ||
| Default Component name | ||
| Change document | ||
| No Input History | ||
| Basic direction is set to LTR | ||
| No BIDI Filtering |
Field Label
| Length | Field Label | |
| Short | 10 | Key |
| Medium | 15 | Key field |
| Long | 20 | Key field |
| Heading | 3 | Key |
Documentation
Definition
Since views can be used in the R/3 System like tables, the key attribute for the fields is assigned analogously as for tables.
The key of a view is important in the following ABAP commands:
UPDATE <view> and INSERT <view>. In this short form of the UPDATE and INSERT commands, the contents of the key fields are used to create the WHERE clause.
SELECT ... FOR ALL ENTRIES ... . With this command, the data can be sorted and compressed internally, whereby the key area is used as unique sorting criterium.
SELECT ... ORDER BY PRIMARY KEY. Sorting is by the fields marked as key field.
To satisfy all these situations, the key must have the following attributes:
- All the key feilds must be together at the beginning of the view. If this is not the case, the fields in between are also assigned the key flag in some cases.
- The key must guarantee that the records read in the key area are unique. To do so, the key is automatically defined for database and projection views. If a unique key cannot be computed, all the fields are considered to be key fields. The uniqueness of the records in the key is thus guaranteed if there are no duplicate data records.
History
| Last changed by/on | SAP | 19970321 |
| SAP Release Created in |
