id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
9961	select_related(depth=0) should be a no-op	Roman Odaisky	nobody	"The documentation does not define any behavior for queryset.select_related(depth=0). The implementation treats that as if the depth parameter were not set at all, selecting all related objects.

I propose having queryset.select_related(depth=0) return the same queryset, unaltered. That does not break documented behavior because it is not documented in the first place.

The reason is uniformity. Suppose I want to test how select_related affects performance. I add a constant and add select_related(depth=SELECT_RELATED_DEPTH) in several places. I want to benchmark the application with different values, but the existing implementation of select_related does not allow me to set a value that would disable select_related altogether.

The patch is very simple, attaching."	Cleanup/optimization	closed	Database layer (models, ORM)	1.0	Normal	wontfix			Accepted	1	0	0	0	0	0