[PR #368/07a72865 backport][stable-2] mysql_role: fix and simplify role member detection #371
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This is a backport of PR #368 as merged into main (07a7286).
bugfix for mysql_role
fixes #366 ("detaching too few members")
Instead of parsing the
show grants
statement output for each user, query the built-in tables to find out who is member of a role.MySQL: mysql.role_edges
MariaDB: mysql.roles_mapping