The Technical Configuration section of a Core Data Services (CDS) entity allows you to define properties that affect the physical storage and performance of the entity in the database. You can define the following properties inside the Technical Configuration section1:
* Index: You can create one or more indexes on the entity to improve the query performance. You can specify the index name, the columns to be indexed, and the index type (such as unique, full-text, or spatial)2.
* Storage Type: You can specify the storage type of the entity, such as column store or row store, to optimize the data access and compression. You can also specify the partitioning mode and criteria for the entity, such as hash, range, or round-robin3.
The other two options, Import and Association, are not properties that can be defined inside the Technical Configuration section. Import is a keyword that allows you to import another CDS entity or a database table into the current CDS entity, and use its columns as part of the projection list4. Association is a keyword that allows you to create a relationship between two CDS entities, and use the associated entity's columns as part of the projection list or the join condition. References: 1: Technical Configuration | SAP Help Portal 2: Index Definition | SAP Help Portal 3: Storage Type | SAP Help Portal 4: Import | SAP Help Portal : [Association | SAP Help Portal]