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
29771	Support database-specific syntax for bulk_update	Tom Forbes	Akash Kumar Sen	"As Simon points out here (https://code.djangoproject.com/ticket/23646#comment:15) specialized syntax can massively speed up `bulk_update()`.

Postgres supports using `UPDATE ... FROM` ([https://stackoverflow.com/questions/18797608/update-multiple-rows-in-same-query-using-postgresql]) and we can possibly emulate this with MySQL and `UNION ...`'s."	Cleanup/optimization	assigned	Database layer (models, ORM)	dev	Normal			Tom Forbes Brillgen Developers Srinivas Reddy Thatiparthy Adam Johnson Shai Berger Akash Kumar Sen John Speno Roman Donchenko	Accepted	0	0	0	0	0	0