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In SAP Gateway Service Builder, you can define a new data model within your project to suit your exact service requirements based on the data you want to expose at runtime. Entity Types Entity Sets Associations Association Sets Function Imports Complex Types
Use entity sets in your Service Builder project to group together instances of an entity type together with instances of any type that are derived from this particular entity type. While an entity type describes a data structure, an entity set contains the instances of the given structure.
Creating an Entity Set
To create an entity set in your Service Builder project, proceed as follows:
  1. Right click the Data Model folder, and select Createand then select Entity Set. Also, you can create a new Entity Set when you right click the Entity Set folder, and select Create. The Create Entity Set dialog opens.
  2. Specify the Entity Set name and the related Entity Type.
Alternatively, use the following steps:
  1. Expand the Data Model folder in the tree view of your project.
  2. Double-click the Entity Set folder to open the mass maintenance view.
  3. Click Display<-> Change (Display<-> Change) in the mass maintenance view and then click Insert Row (Insert Row) to add a new row to the table for the new entity set.
  4. In the Name column, enter a name for the entity set you want to create. You must enter a name in this column. For example, enter NEW_ENTITY_SET.
  5. In the Entity Type Name column, enter the name of an existing entity type or your project or search for an entity type in your project using the input help.
  6. In the Label column, enter a label for the new entity set. You can enter a free-text label directly or use the Label Text Reference Editor to enter the reference type, for example, program, data element, class or program. The reference type you select influences which of the other input fields (that is, Object Name, Key, and Label you can, and need to, edit.
  7. You can define the following optional attributes for the entity set:

    Column

    Description

    Semantics

    Specifies how the entity set is to be used in your service implementation.

    Creatable

    Select this checkbox to indicate that creation is supported by your service implementation.

    Updatable

    Select this checkbox to indicate that updating is supported by your service implementation.

    Deletable

    Select this checkbox to indicate that deletion is supported by your service implementation.

    Pageable

    Select this checkbox to indicate that paging is supported by your service implementation.

    Addressable

    Select this checkbox to indicate that the addressable function is supported by your service implementation.

    Searchable

    Select this checkbox to indicate that searches are supported by your service implementation.

    Subscribable

    Select this checkbox to indicate that subscriptions are supported by your service implementation.

    Requires Filter

    Select this checkbox to indicate that a filter is required by your service implementation. If you select this checkbox, the entity set cannot be accessed directly and cannot be queried without a $filter expression.
  8. Click Save to create the new entity set.
Note To delete an existing entity set, select the relevant row in the mass maintenance view and click Delete Row (Delete Row).