Merge 5.0.80 release and 5.0 community. Version left at 5.0.80.

1 files changed, 29 insertions, 2 deletions

diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index 9a1c35c7d3d..8a0d84c6735 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -186,7 +186,9 @@ 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),
@@ -231,6 +233,7 @@ THD::THD()
   one_shot_set= 0;
   file_id = 0;
   query_id= 0;
+  query_name_consts= 0;
   warn_id= 0;
   db_charset= global_system_variables.collation_database;
   bzero(ha_data, sizeof(ha_data));
@@ -358,6 +361,12 @@ void THD::init(void)
   if (variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES)
     server_status|= SERVER_STATUS_NO_BACKSLASH_ESCAPES;
   options= thd_startup_options;
+
+  if (variables.max_join_size == HA_POS_ERROR)
+    options |= OPTION_BIG_SELECTS;
+  else
+    options &= ~OPTION_BIG_SELECTS;
+
   transaction.all.modified_non_trans_table= transaction.stmt.modified_non_trans_table= FALSE;
   open_options=ha_open_options;
   update_lock_default= (variables.low_priority_updates ?
@@ -408,6 +417,10 @@ 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();
@@ -664,6 +677,8 @@ 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;
 }
 
 
@@ -1060,6 +1075,11 @@ 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())
@@ -1756,7 +1776,7 @@ void Query_arena::set_query_arena(Query_arena *set)
 
 void Query_arena::cleanup_stmt()
 {
-  DBUG_ASSERT("Query_arena::cleanup_stmt()" == "not implemented");
+  DBUG_ASSERT(! "Query_arena::cleanup_stmt() not implemented");
 }
 
 /*
@@ -2142,6 +2162,13 @@ void Security_context::skip_grants()
 }
 
 
+bool Security_context::user_matches(Security_context *them)
+{
+  return ((user != NULL) && (them->user != NULL) &&
+          !strcmp(user, them->user));
+}
+
+
 /****************************************************************************
   Handling of open and locked tables states.