fix mysql_info crash if PUBLIC role is used on MariaDB 10.11+ (#712)

* tests: grant a privilege to the PUBLIC role to force the module to fail * skip the PUBLIC role from the users migration example * Cut the 3rd matching group as it fails to match roles without quotes The group purpose was to match the closing quotes. We don't need the value after the TO. So we can ignore this entirely. * add MariaDB role detection * Add changelog fragment * doc: add notes that users_info doesn't support MariaDB roles.
2025-07-25 22:30:24 -07:00 · 2025-04-28 14:45:33 +02:00 · 2025-04-28 14:45:33 +02:00 · 74ea0438ce
commit 74ea0438ce
parent d44f8f2039
4 changed files with 23 additions and 3 deletions
--- a/changelogs/fragments/grant_to_public.yml
+++ b/changelogs/fragments/grant_to_public.yml
@ -0,0 +1,3 @@
+---
+bugfixes:
+  - mysql_info - fix a crash (ERROR 1141, There is no such grant defined for user 'PUBLIC' on host '%') when using the ``users_info`` filter with a PUBLIC role present in MariaDB 10.11+. Do note that the fix doesn't change the fact that the module won't return the privileges from the PUBLIC role in the users privileges list. It can't do that because you have to login as the particular user and use `SHOW GRANTS FOR CURRENT_USER`. We considered using an aggregation with the `SHOW GRANTS FOR PUBLIC` command. However, this approach would make copying users from one server to another transform the privileges inherited from the role as if they were direct privileges on the user.