Manual merge

1 files changed, 14 insertions, 1 deletions

diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index e00323ebab1..88b7dfb46d7 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -172,7 +172,9 @@ THD::THD()
               /* statement id */ 0),
    Open_tables_state(refresh_version),
    lock_id(&main_lock_id),
-   user_time(0), in_sub_stmt(0), global_read_lock(0), is_fatal_error(0),
+   user_time(0), in_sub_stmt(0),
+   table_map_for_update(0),
+   global_read_lock(0), is_fatal_error(0),
    transaction_rollback_request(0), is_fatal_sub_stmt_error(0),
    rand_used(0), time_zone_used(0),
    last_insert_id_used(0), last_insert_id_used_bin_log(0), insert_id_used(0),
@@ -397,6 +399,10 @@ void THD::init_for_queries()
 
 void THD::change_user(void)
 {
+  pthread_mutex_lock(&LOCK_status);
+  add_to_status(&global_status_var, &status_var);
+  pthread_mutex_unlock(&LOCK_status);
+
   cleanup();
   cleanup_done= 0;
   init();
@@ -653,6 +659,8 @@ void THD::cleanup_after_query()
   free_items();
   /* Reset where. */
   where= THD::DEFAULT_WHERE;
+  /* reset table map for multi-table update */
+  table_map_for_update= 0;
 }
 
 
@@ -1049,6 +1057,11 @@ bool select_send::send_data(List<Item> &items)
       my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
       break;
     }
+    /*
+      Reset buffer to its original state, as it may have been altered in
+      Item::send().
+    */
+    buffer.set(buff, sizeof(buff), &my_charset_bin);
   }
   thd->sent_row_count++;
   if (!thd->vio_ok())