Hi Nithin,
SAP recommends using the entity_name to access the CDS view and not the db_view.
In general, only the CDS entity should be accessed in ABAP programs and in other CDS entities using its name cds_entity and not the CDS database view using the name CDS_DB_VIEW.
Source: http://help.sap.com/abapdocu_740/en/abenddic_cds_views.htm.
BR,
Suhas