13. Implementation of paging loading datasets for SAP ABAP OData service (Paging)

The paging loading of datasets in SAP UI5 applications is an extremely important feature, which requires corresponding development work on both the SAP UI5 front-end and the OData service back-end to realize this scenario.

The so-called paging loading data set means that by default, the SAP UI5 application displays only the data sets of the specified data in the default page after startup. This number is 20 by default, and can also be configured in the system or code.Therefore, we can understand that when the SAP UI5 application is initialized, the first to the 20th data are loaded from the database by default.

When our scroll bar slides down to the bottom of the screen, it will trigger the loading of a new batch of data, and read the 21st to 40th, which is the second 20 pieces of data.

When SAP UI5 calls the background OData service, specify the paging scenario through the parameter $skip=X&$top=Y.

• Where $skip=X, it means to skip the Xth record in the database and start reading from X + 1 record (X is the index value, counting from 0)

• $top=Y, which means to read Y records in the database.

Assuming that the background SAP ABAP OData service has been correctly implemented for the $skip=X&$top=Y passed in by the consumer through the url, the SAP UI5 application,