Backport of:

----------------------------------------------------------
revno: 2630.4.31
committer: Konstantin Osipov <konstantin@mysql.com>
branch nick: mysql-6.0-3726
timestamp: Thu 2008-06-12 06:23:08 +0400
message:
  Extend the signature of TABLE_LIST::init_one_table() to 
  initialize lengths

This is part of WL#3726 post-review fixes.

sql/event_db_repository.cc

@@ -554,7 +554,7 @@ Event_db_repository::open_event_table(THD *thd, enum thr_lock_type lock_type,
   TABLE_LIST tables;
   DBUG_ENTER("Event_db_repository::open_event_table");
 
-  tables.init_one_table("mysql", "event", "event", lock_type);
+  tables.init_one_table("mysql", 5, "event", 5, "event", lock_type);
   alloc_mdl_locks(&tables, thd->mem_root);
 
   if (simple_open_n_lock_tables(thd, &tables))
@@ -1109,7 +1109,7 @@ Event_db_repository::check_system_tables(THD *thd)
 
 
   /* Check mysql.db */
-  tables.init_one_table("mysql", "db", "db", TL_READ);
+  tables.init_one_table("mysql", 5, "db", 2, "db", TL_READ);
   alloc_mdl_locks(&tables, thd->mem_root);
 
   if (simple_open_n_lock_tables(thd, &tables))
@@ -1127,7 +1127,7 @@ Event_db_repository::check_system_tables(THD *thd)
     close_thread_tables(thd);
   }
   /* Check mysql.user */
-  tables.init_one_table("mysql", "user", "user", TL_READ);
+  tables.init_one_table("mysql", 5, "user", 4, "user", TL_READ);
   alloc_mdl_locks(&tables, thd->mem_root);
 
   if (simple_open_n_lock_tables(thd, &tables))
@@ -1148,7 +1148,7 @@ Event_db_repository::check_system_tables(THD *thd)
     close_thread_tables(thd);
   }
   /* Check mysql.event */
-  tables.init_one_table("mysql", "event", "event", TL_READ);
+  tables.init_one_table("mysql", 5, "event", 5, "event", TL_READ);
   alloc_mdl_locks(&tables, thd->mem_root);
 
   if (simple_open_n_lock_tables(thd, &tables))

sql/sql_base.cc

@@ -2924,16 +2924,16 @@ Locked_tables_list::init_locked_tables(THD *thd)
   {
     TABLE_LIST *src_table_list= table->pos_in_table_list;
     char *db, *table_name, *alias;
-    size_t db_len= strlen(src_table_list->db) + 1;
-    size_t table_name_len= strlen(src_table_list->table_name) + 1;
-    size_t alias_len= strlen(src_table_list->alias) + 1;
+    size_t db_len= src_table_list->db_length;
+    size_t table_name_len= src_table_list->table_name_length;
+    size_t alias_len= strlen(src_table_list->alias);
     TABLE_LIST *dst_table_list;
 
     if (! multi_alloc_root(&m_locked_tables_root,
                            &dst_table_list, sizeof(*dst_table_list),
-                           &db, db_len,
-                           &table_name, table_name_len,
-                           &alias, alias_len,
+                           &db, db_len + 1,
+                           &table_name, table_name_len + 1,
+                           &alias, alias_len + 1,
                            NullS))
     {
       unlock_locked_tables(0);
@@ -2947,13 +2947,14 @@ Locked_tables_list::init_locked_tables(THD *thd)
       TL_WRITE_DEFAULT, whereas reginfo.lock_type has been updated from
       thd->update_lock_default.
     */
-    dst_table_list->init_one_table(db, table_name, alias,
+    dst_table_list->init_one_table(db, db_len, table_name, table_name_len,
+                                   alias,
                                    src_table_list->table->reginfo.lock_type);
     dst_table_list->mdl_lock_data= src_table_list->mdl_lock_data;
     dst_table_list->table= table;
-    memcpy(db, src_table_list->db, db_len);
-    memcpy(table_name, src_table_list->table_name, table_name_len);
-    memcpy(alias, src_table_list->alias, alias_len);
+    memcpy(db, src_table_list->db, db_len + 1);
+    memcpy(table_name, src_table_list->table_name, table_name_len + 1);
+    memcpy(alias, src_table_list->alias, alias_len + 1);
     /* Link last into the list of tables */
     *(dst_table_list->prev_global= m_locked_tables_last)= dst_table_list;
     m_locked_tables_last= &dst_table_list->next_global;

sql/table.h

@@ -1120,13 +1120,17 @@ struct TABLE_LIST
     simple_open_and_lock_tables
   */
   inline void init_one_table(const char *db_name_arg,
+                             size_t db_length_arg,
                              const char *table_name_arg,
+                             size_t table_name_length_arg,
                              const char *alias_arg,
                              enum thr_lock_type lock_type_arg)
   {
     bzero((char*) this, sizeof(*this));
     db= (char*) db_name_arg;
+    db_length= db_length_arg;
     table_name= (char*) table_name_arg;
+    table_name_length= table_name_length_arg;
     alias= (char*) alias_arg;
     lock_type= lock_type_arg;
   }