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
31492	Changing field type can cause unrelated nullability change in field on Oracle.	Mariusz Felisiak	Itxaso Aizpurua	"Changing a field type with implicit check constraint (e.g. `PositiveIntegerField`) to a field without it (e.g. `CharField`) causes nullability change because Django drops all check constraints in such case, i.e. `NOT NULL` and `""COLUMN"" >= 0` constraints (see [https://github.com/django/django/blob/505fec6badba0622bbf97bb659188c3d62a9bc58/django/db/backends/base/schema.py#L645-L650 _alter_field()])."	Bug	assigned	Database layer (models, ORM)	3.0	Normal		oracle null	Ian Bottomley	Accepted	0	0	0	0	0	0