BUG#55961 Savepoint Identifier should be enclosed with backticks

Added backticks to the savepoint identifier.

mysql-test/suite/binlog/r/binlog_row_mix_innodb_myisam.result

@@ -48,12 +48,12 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Query	#	#	BEGIN
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	SAVEPOINT my_savepoint
+master-bin.000001	#	Query	#	#	SAVEPOINT `my_savepoint`
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t2)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	ROLLBACK TO my_savepoint
+master-bin.000001	#	Query	#	#	ROLLBACK TO `my_savepoint`
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 delete from t1;
 delete from t2;
@@ -77,12 +77,12 @@ Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Query	#	#	BEGIN
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	SAVEPOINT my_savepoint
+master-bin.000001	#	Query	#	#	SAVEPOINT `my_savepoint`
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t2)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F
-master-bin.000001	#	Query	#	#	ROLLBACK TO my_savepoint
+master-bin.000001	#	Query	#	#	ROLLBACK TO `my_savepoint`
 master-bin.000001	#	Table_map	#	#	table_id: # (test.t1)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */

mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result

@@ -44,10 +44,10 @@ show binlog events from <binlog_start>;
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Query	#	#	BEGIN
 master-bin.000001	#	Query	#	#	use `test`; insert into t1 values(3)
-master-bin.000001	#	Query	#	#	SAVEPOINT my_savepoint
+master-bin.000001	#	Query	#	#	SAVEPOINT `my_savepoint`
 master-bin.000001	#	Query	#	#	use `test`; insert into t1 values(4)
 master-bin.000001	#	Query	#	#	use `test`; insert into t2 select * from t1
-master-bin.000001	#	Query	#	#	ROLLBACK TO my_savepoint
+master-bin.000001	#	Query	#	#	ROLLBACK TO `my_savepoint`
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 delete from t1;
 delete from t2;
@@ -70,10 +70,10 @@ show binlog events from <binlog_start>;
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Query	#	#	BEGIN
 master-bin.000001	#	Query	#	#	use `test`; insert into t1 values(5)
-master-bin.000001	#	Query	#	#	SAVEPOINT my_savepoint
+master-bin.000001	#	Query	#	#	SAVEPOINT `my_savepoint`
 master-bin.000001	#	Query	#	#	use `test`; insert into t1 values(6)
 master-bin.000001	#	Query	#	#	use `test`; insert into t2 select * from t1
-master-bin.000001	#	Query	#	#	ROLLBACK TO my_savepoint
+master-bin.000001	#	Query	#	#	ROLLBACK TO `my_savepoint`
 master-bin.000001	#	Query	#	#	use `test`; insert into t1 values(7)
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 delete from t1;

mysql-test/suite/rpl/r/rpl_begin_commit_rollback.result

@@ -139,14 +139,14 @@ show binlog events from <binlog_start>;
 Log_name	Pos	Event_type	Server_id	End_log_pos	Info
 master-bin.000001	#	Query	#	#	BEGIN
 master-bin.000001	#	Query	#	#	use `test`; INSERT INTO db1.t1 VALUES(20)
-master-bin.000001	#	Query	#	#	SAVEPOINT has_comment
+master-bin.000001	#	Query	#	#	SAVEPOINT `has_comment`
 master-bin.000001	#	Query	#	#	use `db1`; INSERT INTO db1.t1 VALUES(30)
 master-bin.000001	#	Query	#	#	use `db1`; INSERT INTO db1.t2 VALUES("in savepoint has_comment")
-master-bin.000001	#	Query	#	#	SAVEPOINT mixed_cases
+master-bin.000001	#	Query	#	#	SAVEPOINT `mixed_cases`
 master-bin.000001	#	Query	#	#	use `db1`; INSERT INTO db1.t2 VALUES("in savepoint mixed_cases")
 master-bin.000001	#	Query	#	#	use `db1`; INSERT INTO db1.t1 VALUES(40)
-master-bin.000001	#	Query	#	#	ROLLBACK TO mixed_cases
-master-bin.000001	#	Query	#	#	ROLLBACK TO has_comment
+master-bin.000001	#	Query	#	#	ROLLBACK TO `mixed_cases`
+master-bin.000001	#	Query	#	#	ROLLBACK TO `has_comment`
 master-bin.000001	#	Query	#	#	use `db1`; INSERT INTO db1.t2 VALUES("after rollback to")
 master-bin.000001	#	Query	#	#	use `db1`; INSERT INTO db1.t1 VALUES(50)
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */

mysql-test/suite/rpl/r/rpl_innodb_mixed_dml.result

@@ -997,7 +997,7 @@ master-bin.000001	#	Query	#	#	use `test_rpl`; INSERT INTO t1 VALUES (3, 'before
 master-bin.000001	#	Xid	#	#	COMMIT /* XID */
 master-bin.000001	#	Query	#	#	BEGIN
 master-bin.000001	#	Query	#	#	use `test_rpl`; INSERT INTO t1 VALUES (5, 'before savepoint s2')
-master-bin.000001	#	Query	#	#	SAVEPOINT s2
+master-bin.000001	#	Query	#	#	SAVEPOINT `s2`
 master-bin.000001	#	Query	#	#	use `test_rpl`; INSERT INTO t1 VALUES (6, 'after savepoint s2')
 master-bin.000001	#	Table_map	#	#	table_id: # (test_rpl.t1)
 master-bin.000001	#	Write_rows	#	#	table_id: # flags: STMT_END_F

sql/log.cc

@@ -1712,7 +1712,9 @@ static int binlog_savepoint_set(handlerton *hton, THD *thd, void *sv)
 
   String log_query;
   if (log_query.append(STRING_WITH_LEN("SAVEPOINT ")) ||
-      log_query.append(thd->lex->ident.str, thd->lex->ident.length))
+      log_query.append("`") ||
+      log_query.append(thd->lex->ident.str, thd->lex->ident.length) ||
+      log_query.append("`"))
     DBUG_RETURN(1);
   int errcode= query_error_code(thd, thd->killed == THD::NOT_KILLED);
   Query_log_event qinfo(thd, log_query.c_ptr_safe(), log_query.length(),
@@ -1734,7 +1736,9 @@ static int binlog_savepoint_rollback(handlerton *hton, THD *thd, void *sv)
   {
     String log_query;
     if (log_query.append(STRING_WITH_LEN("ROLLBACK TO ")) ||
-        log_query.append(thd->lex->ident.str, thd->lex->ident.length))
+        log_query.append("`") ||
+        log_query.append(thd->lex->ident.str, thd->lex->ident.length) ||
+        log_query.append("`"))
       DBUG_RETURN(1);
     int errcode= query_error_code(thd, thd->killed == THD::NOT_KILLED);
     Query_log_event qinfo(thd, log_query.c_ptr_safe(), log_query.length(),