const coll = assertDropAndRecreateCollection(db, "coll" ); const viewName = "identityView" ; assert .commandWorked(db.createView(viewName, coll.getName(), [])); assert .commandWorked(coll.createIndexes([{a: 1}])); // Performs DISTINCT_SCAN over 'a' . jsTestLog(coll.explain().distinct( 'a' )); // Performs coll scan, while the rest of the work is done in agg. jsTestLog(db[viewName].explain().distinct( 'a' )); // Performs index scan on 'a' , while the rest of the work is done in agg. jsTestLog(db[viewName].explain().distinct( 'a' , {}, {hint: 'a_1' }));