⤷ BC-DWB-DIC-AC (Application Component) Activation Program, Conversion Program, DB Utility, MC, SPDD
⤷ SDTB (Package) ABAP/4 Dictionary: Tables
|Short Description||Cardinality of a relationship|
|Category of Dictionary Type||D||Domain|
|Type of Object Referenced||No Information|
|Domain / Name of Reference Type||CARDLEFT|
|Data Type||CHAR||Character String|
|Search Help: Name|
|Search Help: Parameters|
|Default Component name|
|No Input History|
|Basic direction is set to LTR|
|No BIDI Filtering|
The cardinality (n : m) describes the foreign key relationship with regard to the number of possible dependent records involved (records of the foreign key table) or referred records (records of the check table).
The left side of the cardinality has the following significance:
- n = 1
For each dependent record there is exactly one record of the check table.
- n = C
There can be records in the foreign key talbe which do not reference any record of the check table.
The definition of a generic foreign key means that the cardinalties (1 : m) and (C : m) actually become (CN : m). There can be several records of the check table for each dependent record. The value n = CN cannot however be specified explicitly in maintenance because a CN : m relationship is equal to a foreign key.
|Last changed by/on||SAP||19970321|
|SAP Release Created in|