Based on the provided content, here's a summary of how to implement hierarchical data structures using CDS views in SAP S/4HANA:
-
Define Base View: Create an initial view that represents your base entity (e.g.,
ZCDS_PRODUCT_CATEGORY). This view should include all necessary fields and relationships. -
Create Self-Referencing Association:
- Define a self-referencing association in the base view to link each record with its parent.
- Example annotation:
abap
1@AssociationName: 'ParentCategory' 2@EndType: 'ZCDS_PRODUCT_CATEGORY' 3@Semantics: 'Hierarchical' 4Association: 5 Parent: { Path: 'ParentId' }
-
Create Hierarchy View:
- Use the
HIERARCHYkeyword to create a view that traverses the hierarchical relationship. - Example:
abap
1DEFINE ZCDS_PROD_CAT_HIERARCHY AS SELECT FROM ZCDS_PRODUCT_CATEGORY { 2 CategoryId, 3 ParentId, 4 Name as CategoryName, 5 _ParentCategory.ParentId as ParentCategoryId, 6 HIERARCHY(_ParentCategory) as
- Use the
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