Minor change - fixed function documentation and added

const for two parameters.

sql/event_db_repository.cc

@@ -253,6 +253,7 @@ err_truncate:
       thd          Thread
       schema_table The I_S.EVENTS table
       event_table  The event table to use for loading (mysql.event)
+      db           For which schema to do an index scan.
 
   RETURN VALUE
     0  OK
@@ -261,7 +262,8 @@ err_truncate:
 
 bool
 Event_db_repository::index_read_for_db_for_i_s(THD *thd, TABLE *schema_table,
-                                               TABLE *event_table, char *db)
+                                               TABLE *event_table,
+                                               const char *db)
 {
   int ret=0;
   CHARSET_INFO *scs= system_charset_info;
@@ -369,7 +371,8 @@ Event_db_repository::table_scan_all_for_i_s(THD *thd, TABLE *schema_table,
 */
 
 int
-Event_db_repository::fill_schema_events(THD *thd, TABLE_LIST *tables, char *db)
+Event_db_repository::fill_schema_events(THD *thd, TABLE_LIST *tables,
+                                        const char *db)
 {
   TABLE *schema_table= tables->table;
   TABLE *event_table= NULL;

sql/event_db_repository.h

@@ -80,7 +80,7 @@ public:
   open_event_table(THD *thd, enum thr_lock_type lock_type, TABLE **table);
 
   int
-  fill_schema_events(THD *thd, TABLE_LIST *tables, char *db);
+  fill_schema_events(THD *thd, TABLE_LIST *tables, const char *db);
 
 private:
   void
@@ -88,7 +88,7 @@ private:
                        LEX_STRING field_value);
   bool
   index_read_for_db_for_i_s(THD *thd, TABLE *schema_table, TABLE *event_table,
-                            char *db);
+                            const char *db);
 
   bool
   table_scan_all_for_i_s(THD *thd, TABLE *schema_table, TABLE *event_table);