MDEV-20076: SHOW GRANTS does not quote role names properly

Quotes added to output.

Author: sanja-byelkin

mysql-test/main/connect.result

@@ -108,12 +108,12 @@ update mysql.user set password=old_password("gambling2") where user=_binary"test
 flush privileges;
 show grants for test@localhost;
 Grants for test@localhost
-GRANT ALL PRIVILEGES ON *.* TO 'test'@'localhost' IDENTIFIED BY PASSWORD '2f27438961437573'
+GRANT ALL PRIVILEGES ON *.* TO `test`@`localhost` IDENTIFIED BY PASSWORD '2f27438961437573'
 update mysql.user set plugin='mysql_old_password' where user='test';
 flush privileges;
 show grants for test@localhost;
 Grants for test@localhost
-GRANT ALL PRIVILEGES ON *.* TO 'test'@'localhost' IDENTIFIED BY PASSWORD '2f27438961437573'
+GRANT ALL PRIVILEGES ON *.* TO `test`@`localhost` IDENTIFIED BY PASSWORD '2f27438961437573'
 connect  con10,localhost,test,gambling2,;
 connect  con5,localhost,test,gambling2,mysql;
 connection con5;

mysql-test/main/events_bugs.result

@@ -618,7 +618,7 @@ ERROR 42000: You have an error in your SQL syntax; check the manual that corresp
 USE test;
 SHOW GRANTS FOR CURRENT_USER;
 Grants for root@localhost
-GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION
+GRANT ALL PRIVILEGES ON *.* TO `root`@`localhost` WITH GRANT OPTION
 GRANT PROXY ON ''@'%' TO 'root'@'localhost' WITH GRANT OPTION
 SET GLOBAL event_scheduler = ON;
 CREATE TABLE events_test.event_log
@@ -632,9 +632,9 @@ GRANT create, insert, select, event ON events_test.* TO evtest1@localhost;
 GRANT select,insert ON test.* TO evtest1@localhost;
 SHOW GRANTS FOR evtest1@localhost;
 Grants for evtest1@localhost
-GRANT USAGE ON *.* TO 'evtest1'@'localhost' IDENTIFIED BY PASSWORD '*3170F3644E31580C25DE4A08F4C07CC9A2D40C32'
-GRANT SELECT, INSERT ON `test`.* TO 'evtest1'@'localhost'
-GRANT SELECT, INSERT, CREATE, EVENT ON `events_test`.* TO 'evtest1'@'localhost'
+GRANT USAGE ON *.* TO `evtest1`@`localhost` IDENTIFIED BY PASSWORD '*3170F3644E31580C25DE4A08F4C07CC9A2D40C32'
+GRANT SELECT, INSERT ON `test`.* TO `evtest1`@`localhost`
+GRANT SELECT, INSERT, CREATE, EVENT ON `events_test`.* TO `evtest1`@`localhost`
 connect  e1,localhost,evtest1,ev1,events_test,$MASTER_MYPORT,$MASTER_MYSOCK;
 CREATE EVENT ev_sched_1823 ON SCHEDULE EVERY 2 SECOND
 DO BEGIN

mysql-test/main/events_grant.result

@@ -23,9 +23,9 @@ USER()	DATABASE()
 ev_test@localhost	events_test2
 SHOW GRANTS;
 Grants for ev_test@localhost
-GRANT USAGE ON *.* TO 'ev_test'@'localhost'
-GRANT ALL PRIVILEGES ON `events_test`.* TO 'ev_test'@'localhost'
-GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, TRIGGER, DELETE HISTORY ON `events_test2`.* TO 'ev_test'@'localhost'
+GRANT USAGE ON *.* TO `ev_test`@`localhost`
+GRANT ALL PRIVILEGES ON `events_test`.* TO `ev_test`@`localhost`
+GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, TRIGGER, DELETE HISTORY ON `events_test2`.* TO `ev_test`@`localhost`
 "Here comes an error:";
 SHOW EVENTS;
 ERROR 42000: Access denied for user 'ev_test'@'localhost' to database 'events_test2'

mysql-test/main/fix_priv_tables.result

@@ -10,25 +10,25 @@ SELECT * FROM testdb.t1;
 GRANT CREATE VIEW, SHOW VIEW ON testdb.v1 TO 'show_view_tbl'@'localhost';
 SHOW GRANTS FOR 'show_view_tbl'@'localhost';
 Grants for show_view_tbl@localhost
-GRANT USAGE ON *.* TO 'show_view_tbl'@'localhost'
-GRANT CREATE VIEW, SHOW VIEW ON `testdb`.`v1` TO 'show_view_tbl'@'localhost'
+GRANT USAGE ON *.* TO `show_view_tbl`@`localhost`
+GRANT CREATE VIEW, SHOW VIEW ON `testdb`.`v1` TO `show_view_tbl`@`localhost`
 
 GRANT SELECT(c1) on testdb.v1 to 'select_only_c1'@localhost;
 SHOW GRANTS FOR 'select_only_c1'@'localhost';
 Grants for select_only_c1@localhost
-GRANT USAGE ON *.* TO 'select_only_c1'@'localhost'
-GRANT SELECT (c1) ON `testdb`.`v1` TO 'select_only_c1'@'localhost'
+GRANT USAGE ON *.* TO `select_only_c1`@`localhost`
+GRANT SELECT (c1) ON `testdb`.`v1` TO `select_only_c1`@`localhost`
 
 "after fix privs"
 SHOW GRANTS FOR 'show_view_tbl'@'localhost';
 Grants for show_view_tbl@localhost
-GRANT USAGE ON *.* TO 'show_view_tbl'@'localhost'
-GRANT CREATE VIEW, SHOW VIEW ON `testdb`.`v1` TO 'show_view_tbl'@'localhost'
+GRANT USAGE ON *.* TO `show_view_tbl`@`localhost`
+GRANT CREATE VIEW, SHOW VIEW ON `testdb`.`v1` TO `show_view_tbl`@`localhost`
 
 SHOW GRANTS FOR 'select_only_c1'@'localhost';
 Grants for select_only_c1@localhost
-GRANT USAGE ON *.* TO 'select_only_c1'@'localhost'
-GRANT SELECT (c1) ON `testdb`.`v1` TO 'select_only_c1'@'localhost'
+GRANT USAGE ON *.* TO `select_only_c1`@`localhost`
+GRANT SELECT (c1) ON `testdb`.`v1` TO `select_only_c1`@`localhost`
 
 DROP USER 'show_view_tbl'@'localhost';
 DROP USER 'select_only_c1'@'localhost';