Hierarchy
SAP_BASIS (Software Component) SAP Basis Component⤷
BC-DWB-DIC-AC (Application Component) Activation Program, Conversion Program, DB Utility, MC, SPDD⤷
SDIC (Package) ABAP Dictionary
Basic Data
| Data Element | NULLABLE |
| Short Description | Null values allowed |
Data Type
| Category of Dictionary Type | D | Domain |
| Type of Object Referenced | No Information | |
| Domain / Name of Reference Type | AS4FLAG | |
| 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 | Null |
| Medium | 15 | Null Values |
| Long | 20 | Null values allowed |
| Heading | 0 |
Documentation
Definition
Set this flag if null values should be permitted in a field to be appended or inserted on the database.
Creating and adjusting a table on the database
When a table is created, all the fields of the table are created as NOT NULL and with an initial value. The same is true when a table is adjusted on the database. You therefore have to explicitly select the NULL flag for a new table or one which is to be adjusted if you want null values to be permitted for it on the database.
Appending and inserting new fields
The NULL flag must also be set explicitly when you append or insert new fields if null values should be permitted in this field.
Key fields
The NULL flag has no effect for key fields. These are always automatically assigned initial values.
Behavior for included structures
If the NULL flag is set for an included structure, this means that the attributes are copied from the structure, that is exactly those fields which are marked as NULL in the definition of the structure also have this attribute in the table.
Note: The database can have table fields with null values for which the flag is not set in the ABAP Dictionary.
History
| Last changed by/on | SAP | 19950209 |
| SAP Release Created in |
