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
21636	distinct_on_fields tests require DatabaseFeature.ignores_nulls_in_unique_constraints	Michael Manfre	nobody	"{{{DistinctOnTests.setUp()}}} requires '''DatabaseFeature.ignores_nulls_in_unique_constraints'''.

Django-mssql would skip all of theses tests due to {{{can_distinct_on_fields = False}}}, but it throws a database exception during setUp when it tries to insert multiple NULLs for the '''greatest_fan''', nullable, unique field."	Bug	closed	Testing framework	1.6	Normal	wontfix			Unreviewed	1	0	0	0	1	0