Fixes #19835: enable role attribute change when not changing password (#19834)

Fixes #19835

lib/ansible/modules/database/postgresql/postgresql_user.py

@@ -349,6 +349,56 @@ def user_alter(cursor, module, user, password, role_attr_flags, encrypted, expir
             if current_role_attrs[i] != new_role_attrs[i]:
                 changed = True
 
+    elif no_password_changes and role_attr_flags != '':
+        # Grab role information from pg_roles instead of pg_authid
+        select = "SELECT * FROM pg_roles where rolname=%(user)s"
+        cursor.execute(select, {"user": user})
+        # Grab current role attributes.
+        current_role_attrs = cursor.fetchone()
+
+        role_attr_flags_changing = False
+
+        if role_attr_flags:
+            role_attr_flags_dict = {}
+            for r in role_attr_flags.split(' '):
+                if r.startswith('NO'):
+                    role_attr_flags_dict[r.replace('NO', '', 1)] = False
+                else:
+                    role_attr_flags_dict[r] = True
+
+            for role_attr_name, role_attr_value in role_attr_flags_dict.items():
+                if current_role_attrs[PRIV_TO_AUTHID_COLUMN[role_attr_name]] != role_attr_value:
+                    role_attr_flags_changing = True
+
+        if not role_attr_flags_changing:
+            return False
+
+        alter = ['ALTER USER %(user)s' % {"user": pg_quote_identifier(user, 'role')}]
+        if role_attr_flags:
+            alter.append('WITH %s' % role_attr_flags)
+
+        try:
+            cursor.execute(' '.join(alter))
+        except psycopg2.InternalError:
+            e = get_exception()
+            if e.pgcode == '25006':
+                # Handle errors due to read-only transactions indicated by pgcode 25006
+                # ERROR:  cannot execute ALTER ROLE in a read-only transaction
+                changed = False
+                module.fail_json(msg=e.pgerror)
+                return changed
+            else:
+                raise psycopg2.InternalError(e)
+
+        # Grab new role attributes.
+        cursor.execute(select, {"user": user})
+        new_role_attrs = cursor.fetchone()
+
+        # Detect any differences between current_ and new_role_attrs.
+        for i in range(len(current_role_attrs)):
+            if current_role_attrs[i] != new_role_attrs[i]:
+                changed = True
+
     return changed
 
 def user_delete(cursor, user):