Hi Chandra,You need an odata service.You can generate it via @OData.publish: true in cds view or you can use segw transaction.Please see these linksAbout the ABAP CDS Development User Guide - SAP LibraryRegards,Serkan
I think your code calls setSelectedKey method in sap.m.IconTabBar class. Please control the selected key with getSelectedKey method. If it is already selected then do not call setSelectedKey method.