So(sql,ShouldEqual,"GROUP BY cast(cast(DATEDIFF(second, {d '1970-01-01'}, DATEADD(second, DATEDIFF(second,GETDATE(),GETUTCDATE()), time_column))/300 as int)*300 as int)")
})
Convey("interpolate __timeGroup function with fill (value = NULL)",func(){
_,err:=engine.Interpolate(query,timeRange,"GROUP BY $__timeGroup(time_column,'5m', NULL)")