--- percona-server-5.6.51-91.0/scripts/mysql_system_tables_data.sql~	2021-02-02 15:20:34.000000000 +0100
+++ percona-server-5.6.51-91.0/scripts/mysql_system_tables_data.sql	2021-06-30 09:18:45.855932271 +0200
@@ -33,30 +33,24 @@
 -- a plain character
 SELECT LOWER( REPLACE((SELECT REPLACE(@@hostname,'_','\_')),'%','\%') )INTO @current_hostname;
 
-
--- Fill "db" table with default grants for anyone to
--- access database 'test' and 'test_%' if "db" table didn't exist
-CREATE TEMPORARY TABLE tmp_db LIKE db;
-INSERT INTO tmp_db VALUES ('%','test','','Y','Y','Y','Y','Y','Y','N','Y','Y','Y','Y','Y','Y','Y','Y','N','N','Y','Y');
-INSERT INTO tmp_db VALUES ('%','test\_%','','Y','Y','Y','Y','Y','Y','N','Y','Y','Y','Y','Y','Y','Y','Y','N','N','Y','Y');
-INSERT INTO db SELECT * FROM tmp_db WHERE @had_db_table=0;
-DROP TABLE tmp_db;
-
-
 -- Fill "user" table with default users allowing root access
 -- from local machine if "user" table didn't exist before
 CREATE TEMPORARY TABLE tmp_user LIKE user;
-INSERT INTO tmp_user VALUES ('localhost','root','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
-REPLACE INTO tmp_user SELECT @current_hostname,'root','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N' FROM dual WHERE @current_hostname != 'localhost';
-REPLACE INTO tmp_user VALUES ('127.0.0.1','root','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
-REPLACE INTO tmp_user VALUES ('::1','root','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
+INSERT INTO tmp_user VALUES ('localhost','mysql','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
+REPLACE INTO tmp_user SELECT @current_hostname,'mysql','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N' FROM dual WHERE @current_hostname != 'localhost';
+REPLACE INTO tmp_user VALUES ('127.0.0.1','mysql','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
+REPLACE INTO tmp_user VALUES ('::1','mysql','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
+INSERT INTO tmp_user VALUES ('localhost',      'mysql_sysadmin','','N','N','N','N','N','N',/*10:Reload_priv*/'Y',/*11:Shutdown_priv*/'Y','N','N','N','N','N','N','N','N','N','N','N','N',/*24:Repl_client_priv*/'Y','N','N','N','N','N','N','N','N','','','','',0,0,0,0,'mysql_native_password','','N');
+REPLACE INTO tmp_user SELECT @current_hostname,'mysql_sysadmin','','N','N','N','N','N','N',/*10:Reload_priv*/'Y',/*11:Shutdown_priv*/'Y','N','N','N','N','N','N','N','N','N','N','N','N',/*24:Repl_client_priv*/'Y','N','N','N','N','N','N','N','N','','','','',0,0,0,0,'mysql_native_password','','N' FROM dual WHERE @current_hostname != 'localhost';
+REPLACE INTO tmp_user VALUES ('127.0.0.1',     'mysql_sysadmin','','N','N','N','N','N','N',/*10:Reload_priv*/'Y',/*11:Shutdown_priv*/'Y','N','N','N','N','N','N','N','N','N','N','N','N',/*24:Repl_client_priv*/'Y','N','N','N','N','N','N','N','N','','','','',0,0,0,0,'mysql_native_password','','N');
+REPLACE INTO tmp_user VALUES ('::1',           'mysql_sysadmin','','N','N','N','N','N','N',/*10:Reload_priv*/'Y',/*11:Shutdown_priv*/'Y','N','N','N','N','N','N','N','N','N','N','N','N',/*24:Repl_client_priv*/'Y','N','N','N','N','N','N','N','N','','','','',0,0,0,0,'mysql_native_password','','N');
 INSERT INTO tmp_user (host,user) VALUES ('localhost','');
 INSERT INTO tmp_user (host,user) SELECT @current_hostname,'' FROM dual WHERE @current_hostname != 'localhost';
 INSERT INTO user SELECT * FROM tmp_user WHERE @had_user_table=0;
 DROP TABLE tmp_user;
 
 CREATE TEMPORARY TABLE tmp_proxies_priv LIKE proxies_priv;
-INSERT INTO tmp_proxies_priv VALUES ('localhost', 'root', '', '', TRUE, '', now());
-REPLACE INTO tmp_proxies_priv SELECT @current_hostname, 'root', '', '', TRUE, '', now() FROM DUAL WHERE LOWER (@current_hostname) != 'localhost';
+INSERT INTO tmp_proxies_priv VALUES ('localhost', 'mysql', '', '', TRUE, '', now());
+REPLACE INTO tmp_proxies_priv SELECT @current_hostname, 'mysql', '', '', TRUE, '', now() FROM DUAL WHERE LOWER (@current_hostname) != 'localhost';
 INSERT INTO  proxies_priv SELECT * FROM tmp_proxies_priv WHERE @had_proxies_priv_table=0;
 DROP TABLE tmp_proxies_priv;