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
19630	documentation for QuerySet.exists() a bit misleading?	knewB	nobody	"[https://docs.djangoproject.com/en/1.4/ref/models/querysets/#exists]
says ""calling QuerySet.exists() is faster than bool(some_query_set), but not by a large degree."" 

Using SQLite and MySQL, QuerySet.exists() results in 

{{{
SELECT (1) AS ""a"" FROM foo WHERE bar LIMIT 1
}}}

rather than 

{{{
SELECT EXISTS(...) 
}}}

but in any case, isn't this a lot faster than bool(some_query_set) ?"	Uncategorized	closed	Documentation	1.4	Normal	invalid			Unreviewed	0	0	0	0	0	0