post merge

sql/item.cc

@@ -2670,11 +2670,6 @@ void Item_ref::cleanup()
   DBUG_ENTER("Item_ref::cleanup");
   Item_ident::cleanup();
   result_field= 0;
-  DBUG_PRINT("info", ("hook: 0x%lx(0x%lx) original item: 0x%lx",
-		      (ulong)hook_ptr, (ulong)(hook_ptr?*hook_ptr:0),
-		      (ulong)orig_item));
-  if (hook_ptr)
-    *hook_ptr= orig_item;
   DBUG_VOID_RETURN;
 }
 

sql/mysql_priv.h

@@ -619,8 +619,7 @@ int mysql_multi_update(THD *thd, TABLE_LIST *table_list,
 		       List<Item> *fields, List<Item> *values,
 		       COND *conds, ulong options,
 		       enum enum_duplicates handle_duplicates,
-		       SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex,
-		       bool converted);
+		       SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex);
 int mysql_prepare_insert(THD *thd, TABLE_LIST *table_list, TABLE *table,
 			 List<Item> &fields, List_item *values,
 			 List<Item> &update_fields,
@@ -661,7 +660,8 @@ find_field_in_table(THD *thd, TABLE_LIST *table_list,
                     uint length, Item **ref,
                     bool check_grants_table, bool check_grants_view,
                     bool allow_rowid,
-                    uint *cached_field_index_ptr);
+                    uint *cached_field_index_ptr,
+                    bool register_tree_change);
 Field *
 find_field_in_real_table(THD *thd, TABLE *table, const char *name,
                          uint length, bool check_grants, bool allow_rowid,

sql/sql_acl.cc

@@ -2360,7 +2360,7 @@ int mysql_table_grant(THD *thd, TABLE_LIST *table_list,
       if (!find_field_in_table(thd, table_list, column->column.ptr(),
                                column->column.ptr(),
                                column->column.length(), 0, 0, 0, 0,
-                               &unused_field_idx))
+                               &unused_field_idx, FALSE))
       {
 	my_error(ER_BAD_FIELD_ERROR, MYF(0),
                  column->column.c_ptr(), table_list->alias);

sql/sql_base.cc

@@ -2069,6 +2069,8 @@ const Field *view_ref_found= (Field*) 0x2;
     allow_rowid			do allow finding of "_rowid" field?
     cached_field_index_ptr	cached position in field list (used to
 				  speedup prepared tables field finding)
+    register_tree_change        TRUE if ref is not stack variable and we
+                                  need register changes in item tree
 
   RETURN
     0			field is not found
@@ -2082,7 +2084,8 @@ find_field_in_table(THD *thd, TABLE_LIST *table_list,
                     uint length, Item **ref,
                     bool check_grants_table, bool check_grants_view,
                     bool allow_rowid,
-                    uint *cached_field_index_ptr)
+                    uint *cached_field_index_ptr,
+                    bool register_tree_change)
 {
   DBUG_ENTER("find_field_in_table");
   DBUG_PRINT("enter", ("table:%s name: %s item name %s, ref 0x%lx",
@@ -2109,10 +2112,11 @@ find_field_in_table(THD *thd, TABLE_LIST *table_list,
           *ref= trans[i].item;
         else
         {
-          Item_ref *item_ref= new Item_ref(trans[i].item, table_list->view_name.str,
+          Item_ref *item_ref= new Item_ref(&trans[i].item,
+                                           table_list->view_name.str,
                                            item_name);
           /* as far as Item_ref have defined reference it do not need tables */
-          if (item_ref)
+          if (register_tree_change && item_ref)
           {
             thd->change_item_tree(ref, item_ref);
             (*ref)->fix_fields(thd, 0, ref);
@@ -2288,7 +2292,8 @@ find_field_in_tables(THD *thd, Item_ident *item, TABLE_LIST *tables,
 					check_privileges),
 				       (test(table->grant.want_privilege) &&
 					check_privileges),
-				       1, &(item->cached_field_index));
+				       1, &(item->cached_field_index),
+                                       TRUE);
     }
     if (found)
     {
@@ -2327,7 +2332,8 @@ find_field_in_tables(THD *thd, Item_ident *item, TABLE_LIST *tables,
                                           check_privileges),
 					 (test(tables->grant.want_privilege) &&
                                           check_privileges),
-					 1, &(item->cached_field_index));
+					 1, &(item->cached_field_index),
+                                         TRUE);
 	if (find)
 	{
 	  item->cached_table= tables;
@@ -2392,7 +2398,9 @@ find_field_in_tables(THD *thd, Item_ident *item, TABLE_LIST *tables,
                                        check_privileges),
 				      (test(tables->grant.want_privilege) &&
                                        check_privileges),
-				      allow_rowid, &(item->cached_field_index));
+				      allow_rowid,
+                                      &(item->cached_field_index),
+                                      TRUE);
     if (field)
     {
       if (field == WRONG_GRANT)
@@ -3028,7 +3036,7 @@ insert_fields(THD *thd, TABLE_LIST *tables, const char *db_name,
             !find_field_in_table(thd, natural_join_table, field_name,
                                  field_name,
                                  strlen(field_name), &not_used_item, 0, 0, 0,
-                                 &not_used_field_index))
+                                 &not_used_field_index, TRUE))
         {
           Item *item= iterator->item(thd);
           if (!found++)
@@ -3037,7 +3045,7 @@ insert_fields(THD *thd, TABLE_LIST *tables, const char *db_name,
             it->after(item);
 	  if (view && !thd->lex->current_select->no_wrap_view_item)
 	  {
-	    item= new Item_ref(it->ref(), NULL, tables->view_name.str,
+	    item= new Item_ref(it->ref(), tables->view_name.str,
 			       field_name);
 	  }
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
@@ -3252,7 +3260,8 @@ int setup_conds(THD *thd, TABLE_LIST *tables, TABLE_LIST *leaves, COND **conds)
                                              t1_field_name,
                                              strlen(t1_field_name), &item_t2,
                                              0, 0, 0,
-                                             &not_used_field_index)))
+                                             &not_used_field_index,
+                                             FALSE)))
           {
             if (t2_field != view_ref_found)
             {
@@ -3262,13 +3271,6 @@ int setup_conds(THD *thd, TABLE_LIST *tables, TABLE_LIST *leaves, COND **conds)
               t2_field->query_id= thd->query_id;
               t2->used_keys.intersect(t2_field->part_of_key);
             }
-	    else
-	    {
-	      DBUG_ASSERT(t2_field == view_ref_found &&
-			  item_t2->type() == Item::REF_ITEM);
-	      /* remove hooking to stack variable */
-	      ((Item_ref*) item_t2)->hook_ptr= 0;
-	    }
             if ((t1_field= iterator->field()))
             {
               /* Mark field used for table cache */

sql/sql_insert.cc

@@ -1781,7 +1781,7 @@ select_insert::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
     query
   */
   if (!(thd->lex->current_select->options & OPTION_BUFFER_RESULT) &&
-      unique_table(table_list, table_list->next_independent()))
+      unique_table(table_list, table_list->next_global))
   {
     /* Using same table for INSERT and SELECT */
     thd->lex->current_select->options|= OPTION_BUFFER_RESULT;

sql/sql_lex.cc

@@ -150,7 +150,7 @@ void lex_start(THD *thd, uchar *buf,uint length)
   lex->found_colon= 0;
   lex->safe_to_cache_query= 1;
   lex->time_zone_tables_used= 0;
-  lex->proc_table= lex->query_tables= 0;
+  lex->leaf_tables_insert= lex->proc_table= lex->query_tables= 0;
   lex->query_tables_last= &lex->query_tables;
   lex->variables_used= 0;
   lex->select_lex.parent_lex= lex;

sql/sql_lex.h

@@ -710,6 +710,7 @@ typedef struct st_lex
   uint grant, grant_tot_col, which_columns;
   uint fk_delete_opt, fk_update_opt, fk_match_option;
   uint slave_thd_opt;
+  uint table_count; /* used when usual update transformed in multiupdate */
   uint8 describe;
   uint8 derived_tables;
   uint8 create_view_algorithm;

sql/sql_load.cc

@@ -121,9 +121,12 @@ int mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
   table_list->lock_type= lock_type;
   if ((res= open_and_lock_tables(thd, table_list)))
     DBUG_RETURN(res);
-  if (setup_tables(thd, table_list, &unused_conds))
+  if (setup_tables(thd, table_list, &unused_conds,
+		   &thd->lex->select_lex.leaf_tables, 0))
      DBUG_RETURN(-1);
-  if (!table_list->updatable || check_key_in_view(thd, table_list))
+  if (!table_list->table ||               // do not suport join view
+      !table_list->updatable ||           // and derived tables
+      check_key_in_view(thd, table_list))
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "LOAD");
     DBUG_RETURN(-1);

sql/sql_parse.cc

@@ -2801,7 +2801,6 @@ mysql_execute_command(THD *thd)
       break;
   case SQLCOM_UPDATE_MULTI:
   {
-    bool converted= 0;
     DBUG_ASSERT(first_table == all_tables && first_table != 0);
     if (res != 2)
     {
@@ -2809,17 +2808,14 @@ mysql_execute_command(THD *thd)
         break;
     }
     else
-    {
       res= 0;
-      converted= 1;
-    }
+
     res= mysql_multi_update(thd, all_tables,
 			    &select_lex->item_list,
 			    &lex->value_list,
 			    select_lex->where,
 			    select_lex->options,
-			    lex->duplicates, unit, select_lex,
-                            converted);
+			    lex->duplicates, unit, select_lex);
     break;
   }
   case SQLCOM_REPLACE:

sql/sql_update.cc

@@ -127,6 +127,7 @@ int mysql_update(THD *thd,
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
   uint		want_privilege;
 #endif
+  uint          table_count= 0;
   ulong		query_id=thd->query_id, timestamp_query_id;
   ha_rows	updated, found;
   key_map	old_used_keys;
@@ -138,17 +139,26 @@ int mysql_update(THD *thd,
   LINT_INIT(used_index);
   LINT_INIT(timestamp_query_id);
 
-  if ((error= open_and_lock_tables(thd, table_list)))
-    DBUG_RETURN(error);
+  if (open_tables(thd, table_list, &table_count))
+    DBUG_RETURN(thd->net.report_error ? -1 : 1);
 
   if (table_list->table == 0)
   {
     DBUG_ASSERT(table_list->view &&
 		table_list->ancestor && table_list->ancestor->next_local);
     DBUG_PRINT("info", ("Switch to multi-update"));
+    /* pass counter value */
+    thd->lex->table_count= table_count;
     /* convert to multiupdate */
     return 2;
   }
+
+  if (lock_tables(thd, table_list, table_count) ||
+      mysql_handle_derived(thd->lex, &mysql_derived_prepare) ||
+      (thd->fill_derived_tables() &&
+       mysql_handle_derived(thd->lex, &mysql_derived_filling)))
+    DBUG_RETURN(thd->net.report_error ? -1 : 1);
+
   thd->proc_info="init";
   table= table_list->table;
   table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
@@ -614,14 +624,25 @@ int mysql_multi_update_prepare(THD *thd)
   table_map tables_for_update;
   int res;
   bool update_view= 0;
-  uint  table_count;
+  /*
+    if this multi-update was converted from usual update, here is table
+    counter else junk will be assigned here, but then replaced with real
+    count in open_tables()
+  */
+  uint  table_count= lex->table_count;
   const bool using_lock_tables= thd->locked_tables != 0;
+  bool original_multiupdate= (thd->lex->sql_command == SQLCOM_UPDATE_MULTI);
   DBUG_ENTER("mysql_multi_update_prepare");
 
   /* open tables and create derived ones, but do not lock and fill them */
-  if (open_tables(thd, table_list, & table_count) ||
+  if ((original_multiupdate && open_tables(thd, table_list, & table_count)) ||
       mysql_handle_derived(lex, &mysql_derived_prepare))
     DBUG_RETURN(thd->net.report_error ? -1 : 1);
+  /*
+    setup_tables() need for VIEWs. JOIN::prepare() will call setup_tables()
+    second time, but this call will do nothing (there are check for second
+    call in setup_tables()).
+  */
   if (setup_tables(thd, table_list, &lex->select_lex.where,
                    &lex->select_lex.leaf_tables, 0))
     DBUG_RETURN(-1);
@@ -644,11 +665,6 @@ int mysql_multi_update_prepare(THD *thd)
         (UPDATE_ACL & ~table->grant.privilege);
   }
 
-  /*
-    setup_tables() need for VIEWs. JOIN::prepare() will call setup_tables()
-    second time, but this call will do nothing (there are check for second
-    call in setup_tables()).
-  */
   if ((lex->select_lex.no_wrap_view_item= 1,
        res= setup_fields(thd, 0, table_list, *fields, 1, 0, 0),
        lex->select_lex.no_wrap_view_item= 0,
@@ -675,7 +691,16 @@ int mysql_multi_update_prepare(THD *thd)
     Setup timestamp handling and locking mode
   */
   for (tl= leaves; tl; tl= tl->next_leaf)
-
+  {
+    TABLE *table= tl->table;
+    TABLE_LIST *tlist= tl->belong_to_view?tl->belong_to_view:tl;
+
+    /* We only need SELECT privilege for columns in the values list */
+    tlist->grant.want_privilege= table->grant.want_privilege=
+      (SELECT_ACL & ~table->grant.privilege);
+    /* Only set timestamp column if this is not modified */
+    if (table->timestamp_field &&
+        table->timestamp_field->query_id == thd->query_id)
       table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
 
     /* if table will be updated then check that it is unique */
@@ -711,6 +736,23 @@ int mysql_multi_update_prepare(THD *thd)
       tl->table->reginfo.lock_type= tl->lock_type;
   }
 
+  /* check single table update for view compound from several tables */
+  for (tl= table_list; tl; tl= tl->next_local)
+  {
+    if (tl->table == 0)
+    {
+      DBUG_ASSERT(tl->view &&
+		  tl->ancestor && tl->ancestor->next_local);
+      TABLE_LIST *for_update= 0;
+      if (tl->check_single_table(&for_update, tables_for_update))
+      {
+	my_error(ER_VIEW_MULTIUPDATE, MYF(0),
+		 tl->view_db.str, tl->view_name.str);
+	DBUG_RETURN(-1);
+      }
+    }
+  }
+
   opened_tables= thd->status_var.opened_tables;
   /* now lock and fill tables */
   if (lock_tables(thd, table_list, table_count))
@@ -740,7 +782,8 @@ int mysql_multi_update_prepare(THD *thd)
     /* undone setup_tables() */
     table_list->setup_is_done= 0;
 
-    if (setup_tables(thd, table_list, &lex->select_lex.where) ||
+    if (setup_tables(thd, table_list, &lex->select_lex.where,
+                     &lex->select_lex.leaf_tables, 0) ||
         (lex->select_lex.no_wrap_view_item= 1,
          res= setup_fields(thd, 0, table_list, *fields, 1, 0, 0),
          lex->select_lex.no_wrap_view_item= 0,
@@ -765,8 +808,7 @@ int mysql_multi_update(THD *thd,
 		       COND *conds,
 		       ulong options,
 		       enum enum_duplicates handle_duplicates,
-		       SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex,
-		       bool converted)
+		       SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex)
 {
   int res= 0;
   multi_update *result;

sql/table.cc

@@ -1841,9 +1841,10 @@ void st_table_list::cleanup_items()
   if (!field_translation)
     return;
 
-  Item **end= field_translation + view->select_lex.item_list.elements;
-  for (Item **item= field_translation; item < end; item++)
-    (*item)->walk(&Item::cleanup_processor, 0);
+  Field_translator *end= (field_translation +
+                          view->select_lex.item_list.elements);
+  for (Field_translator *transl= field_translation; transl < end; transl++)
+    transl->item->walk(&Item::cleanup_processor, 0);
 }
 
 
@@ -1883,7 +1884,7 @@ int st_table_list::view_check_option(THD *thd, bool ignore_failure)
 
 /*
   Find table in underlaying tables by mask and check that only this
-  table sbelong to given mask
+  table belong to given mask
 
   SYNOPSIS
     st_table_list::check_single_table()
@@ -1893,8 +1894,8 @@ int st_table_list::view_check_option(THD *thd, bool ignore_failure)
     map         bit mask of tables
 
   RETURN
-    0 table not found or found only one
-    1 found several tables
+    FALSE table not found or found only one
+    TRUE  found several tables
 */
 
 bool st_table_list::check_single_table(st_table_list **table, table_map map)
@@ -1906,15 +1907,16 @@ bool st_table_list::check_single_table(st_table_list **table, table_map map)
       if (tbl->table->map & map)
       {
 	if (*table)
-	  return 1;
+	  return TRUE;
 	else
 	  *table= tbl;
       }
     }
     else
       if (tbl->check_single_table(table, map))
-	return 1;
+	return TRUE;
   }
+  return FALSE;
 }