issue correct error message in case of view presence for duplicated table on update (BUG#10773)

frequently used command sequence replaced with inline function


BitKeeper/etc/config:
  logging switching off
mysql-test/r/lowercase_view.result:
  hided view underlying tables from error message
mysql-test/r/view.result:
  hided view underlying tables from error message
mysql-test/t/lowercase_view.test:
  hided view underlying tables from error message
mysql-test/t/view.test:
  hided view underlying tables from error message
sql/mysql_priv.h:
  subroutine which return correct error message
sql/share/errmsg.txt:
  new error message
sql/sql_base.cc:
  subroutine which issue correct error message in case of view presence for duplicated table on update
sql/sql_delete.cc:
  issue correct error message in case of view presence for duplicated table on update
sql/sql_insert.cc:
  issue correct error message in case of view presence for duplicated table on update
sql/sql_parse.cc:
  issue correct error message in case of view presence for duplicated table on update
sql/sql_update.cc:
  issue correct error message in case of view presence for duplicated table on update
sql/sql_view.cc:
  frequently used command sequence replaced with inline function
sql/table.cc:
  frequently used command sequence replaced with inline function
sql/table.h:
  frequently used command sequence replaced with inline function

BitKeeper/etc/config

@@ -24,7 +24,7 @@ description: MySQL - fast and reliable SQL database
 # repository is commercial it can be an internal email address or "none"
 # to disable logging.
 # 
-logging:  logging@openlogging.org
+logging:  none
 # 
 # If this field is set, all checkins will appear to be made by this user,
 # in effect making this a single user package.  Single user packages are

mysql-test/t/lowercase_view.test

@@ -23,29 +23,29 @@ create table t2aA (col1 int);
 create view v1Aa as select * from t1aA;
 create view v2aA as select * from v1aA;
 create view v3Aa as select v2Aa.col1 from v2aA,t2Aa where v2Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update v2aA set col1 = (select max(col1) from v1Aa);
--- error 1093
+-- error 1423
 update v2Aa set col1 = (select max(col1) from t1Aa);
 -- error 1093
 update v2aA set col1 = (select max(col1) from v2Aa);
--- error 1093
+-- error 1423
 update v2aA,t2Aa set v2Aa.col1 = (select max(col1) from v1aA) where v2aA.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t1aA,t2Aa set t1Aa.col1 = (select max(col1) from v1Aa) where t1aA.col1 = t2aA.col1;
 -- error 1093
 update v1aA,t2Aa set v1Aa.col1 = (select max(col1) from v1aA) where v1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t2Aa,v2Aa set v2aA.col1 = (select max(col1) from v1aA) where v2Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t2Aa,t1Aa set t1aA.col1 = (select max(col1) from v1Aa) where t1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t2Aa,v1aA set v1Aa.col1 = (select max(col1) from v1aA) where v1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update v2aA,t2Aa set v2Aa.col1 = (select max(col1) from t1aA) where v2aA.col1 = t2aA.col1;
 -- error 1093
 update t1Aa,t2Aa set t1aA.col1 = (select max(col1) from t1Aa) where t1aA.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update v1aA,t2Aa set v1Aa.col1 = (select max(col1) from t1Aa) where v1aA.col1 = t2aA.col1;
 -- error 1093
 update t2Aa,v2Aa set v2aA.col1 = (select max(col1) from t1aA) where v2Aa.col1 = t2aA.col1;
@@ -55,71 +55,71 @@ update t2Aa,t1Aa set t1aA.col1 = (select max(col1) from t1Aa) where t1aA.col1 =
 update t2Aa,v1Aa set v1aA.col1 = (select max(col1) from t1Aa) where v1Aa.col1 = t2aA.col1;
 -- error 1093
 update v2aA,t2Aa set v2Aa.col1 = (select max(col1) from v2aA) where v2Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t1aA,t2Aa set t1Aa.col1 = (select max(col1) from v2aA) where t1aA.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update v1aA,t2Aa set v1Aa.col1 = (select max(col1) from v2Aa) where v1aA.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t2Aa,v2aA set v2Aa.col1 = (select max(col1) from v2aA) where v2Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t2Aa,t1Aa set t1aA.col1 = (select max(col1) from v2aA) where t1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update t2Aa,v1Aa set v1aA.col1 = (select max(col1) from v2Aa) where v1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 update v3aA set v3Aa.col1 = (select max(col1) from v1aA);
--- error 1093
+-- error 1423
 update v3aA set v3Aa.col1 = (select max(col1) from t1aA);
--- error 1093
+-- error 1423
 update v3aA set v3Aa.col1 = (select max(col1) from v2aA);
 -- error 1093
 update v3aA set v3Aa.col1 = (select max(col1) from v3aA);
--- error 1093
+-- error 1423
 delete from v2Aa where col1 = (select max(col1) from v1Aa);
--- error 1093
+-- error 1423
 delete from v2aA where col1 = (select max(col1) from t1Aa);
 -- error 1093
 delete from v2Aa where col1 = (select max(col1) from v2aA);
--- error 1093
+-- error 1423
 delete v2Aa from v2aA,t2Aa where (select max(col1) from v1aA) > 0 and v2Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 delete t1aA from t1Aa,t2Aa where (select max(col1) from v1Aa) > 0 and t1aA.col1 = t2aA.col1;
 -- error 1093
 delete v1aA from v1Aa,t2Aa where (select max(col1) from v1aA) > 0 and v1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 delete v2aA from v2Aa,t2Aa where (select max(col1) from t1Aa) > 0 and v2aA.col1 = t2aA.col1;
 -- error 1093
 delete t1aA from t1Aa,t2Aa where (select max(col1) from t1aA) > 0 and t1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 delete v1aA from v1Aa,t2Aa where (select max(col1) from t1aA) > 0 and v1aA.col1 = t2aA.col1;
 -- error 1093
 delete v2Aa from v2aA,t2Aa where (select max(col1) from v2Aa) > 0 and v2aA.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 delete t1Aa from t1aA,t2Aa where (select max(col1) from v2Aa) > 0 and t1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 delete v1Aa from v1aA,t2Aa where (select max(col1) from v2aA) > 0 and v1Aa.col1 = t2aA.col1;
--- error 1093
+-- error 1423
 insert into v2Aa values ((select max(col1) from v1aA));
--- error 1093
+-- error 1423
 insert into t1aA values ((select max(col1) from v1Aa));
--- error 1093
+-- error 1423
 insert into v2aA values ((select max(col1) from v1aA));
--- error 1093
+-- error 1423
 insert into v2Aa values ((select max(col1) from t1Aa));
 -- error 1093
 insert into t1aA values ((select max(col1) from t1Aa));
--- error 1093
+-- error 1423
 insert into v2aA values ((select max(col1) from t1aA));
 -- error 1093
 insert into v2Aa values ((select max(col1) from v2aA));
--- error 1093
+-- error 1423
 insert into t1Aa values ((select max(col1) from v2Aa));
 -- error 1093
 insert into v2aA values ((select max(col1) from v2Aa));
--- error 1093
+-- error 1423
 insert into v3Aa (col1) values ((select max(col1) from v1Aa));
--- error 1093
+-- error 1423
 insert into v3aA (col1) values ((select max(col1) from t1aA));
--- error 1093
+-- error 1423
 insert into v3Aa (col1) values ((select max(col1) from v2aA));
 drop view v3aA,v2Aa,v1aA;
 drop table t1Aa,t2Aa;

mysql-test/t/view.test

@@ -827,29 +827,29 @@ create table t2 (col1 int);
 create view v1 as select * from t1;
 create view v2 as select * from v1;
 create view v3 as select v2.col1 from v2,t2 where v2.col1 = t2.col1;
--- error 1093
+-- error 1423
 update v2 set col1 = (select max(col1) from v1);
--- error 1093
+-- error 1423
 update v2 set col1 = (select max(col1) from t1);
 -- error 1093
 update v2 set col1 = (select max(col1) from v2);
--- error 1093
+-- error 1423
 update v2,t2 set v2.col1 = (select max(col1) from v1) where v2.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t1,t2 set t1.col1 = (select max(col1) from v1) where t1.col1 = t2.col1;
 -- error 1093
 update v1,t2 set v1.col1 = (select max(col1) from v1) where v1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t2,v2 set v2.col1 = (select max(col1) from v1) where v2.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t2,t1 set t1.col1 = (select max(col1) from v1) where t1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t2,v1 set v1.col1 = (select max(col1) from v1) where v1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update v2,t2 set v2.col1 = (select max(col1) from t1) where v2.col1 = t2.col1;
 -- error 1093
 update t1,t2 set t1.col1 = (select max(col1) from t1) where t1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update v1,t2 set v1.col1 = (select max(col1) from t1) where v1.col1 = t2.col1;
 -- error 1093
 update t2,v2 set v2.col1 = (select max(col1) from t1) where v2.col1 = t2.col1;
@@ -859,74 +859,74 @@ update t2,t1 set t1.col1 = (select max(col1) from t1) where t1.col1 = t2.col1;
 update t2,v1 set v1.col1 = (select max(col1) from t1) where v1.col1 = t2.col1;
 -- error 1093
 update v2,t2 set v2.col1 = (select max(col1) from v2) where v2.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t1,t2 set t1.col1 = (select max(col1) from v2) where t1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update v1,t2 set v1.col1 = (select max(col1) from v2) where v1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t2,v2 set v2.col1 = (select max(col1) from v2) where v2.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t2,t1 set t1.col1 = (select max(col1) from v2) where t1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update t2,v1 set v1.col1 = (select max(col1) from v2) where v1.col1 = t2.col1;
--- error 1093
+-- error 1423
 update v3 set v3.col1 = (select max(col1) from v1);
--- error 1093
+-- error 1423
 update v3 set v3.col1 = (select max(col1) from t1);
--- error 1093
+-- error 1423
 update v3 set v3.col1 = (select max(col1) from v2);
 -- error 1093
 update v3 set v3.col1 = (select max(col1) from v3);
--- error 1093
+-- error 1423
 delete from v2 where col1 = (select max(col1) from v1);
--- error 1093
+-- error 1423
 delete from v2 where col1 = (select max(col1) from t1);
 -- error 1093
 delete from v2 where col1 = (select max(col1) from v2);
--- error 1093
+-- error 1423
 delete v2 from v2,t2 where (select max(col1) from v1) > 0 and v2.col1 = t2.col1;
--- error 1093
+-- error 1423
 delete t1 from t1,t2 where (select max(col1) from v1) > 0 and t1.col1 = t2.col1;
 -- error 1093
 delete v1 from v1,t2 where (select max(col1) from v1) > 0 and v1.col1 = t2.col1;
--- error 1093
+-- error 1423
 delete v2 from v2,t2 where (select max(col1) from t1) > 0 and v2.col1 = t2.col1;
 -- error 1093
 delete t1 from t1,t2 where (select max(col1) from t1) > 0 and t1.col1 = t2.col1;
--- error 1093
+-- error 1423
 delete v1 from v1,t2 where (select max(col1) from t1) > 0 and v1.col1 = t2.col1;
 -- error 1093
 delete v2 from v2,t2 where (select max(col1) from v2) > 0 and v2.col1 = t2.col1;
--- error 1093
+-- error 1423
 delete t1 from t1,t2 where (select max(col1) from v2) > 0 and t1.col1 = t2.col1;
--- error 1093
+-- error 1423
 delete v1 from v1,t2 where (select max(col1) from v2) > 0 and v1.col1 = t2.col1;
--- error 1093
+-- error 1423
 insert into v2 values ((select max(col1) from v1));
--- error 1093
+-- error 1423
 insert into t1 values ((select max(col1) from v1));
--- error 1093
+-- error 1423
 insert into v2 values ((select max(col1) from v1));
--- error 1093
+-- error 1423
 insert into v2 values ((select max(col1) from t1));
 -- error 1093
 insert into t1 values ((select max(col1) from t1));
--- error 1093
+-- error 1423
 insert into v2 values ((select max(col1) from t1));
 -- error 1093
 insert into v2 values ((select max(col1) from v2));
--- error 1093
+-- error 1423
 insert into t1 values ((select max(col1) from v2));
 -- error 1093
 insert into v2 values ((select max(col1) from v2));
--- error 1093
+-- error 1423
 insert into v3 (col1) values ((select max(col1) from v1));
--- error 1093
+-- error 1423
 insert into v3 (col1) values ((select max(col1) from t1));
--- error 1093
+-- error 1423
 insert into v3 (col1) values ((select max(col1) from v2));
 #check with TZ tables in list
--- error 1093
+-- error 1423
 insert into v3 (col1) values ((select CONVERT_TZ('20050101000000','UTC','MET') from v2));
 insert into v3 (col1) values ((select CONVERT_TZ('20050101000000','UTC','MET') from t2));
 -- error 1048
@@ -1242,7 +1242,7 @@ create view v3 as select * from t1 where 20 < (select (s1) from v2);
 -- error 1288
 insert into v3 values (30);
 create view v4 as select * from v2 where 20 < (select (s1) from t1);
--- error 1093
+-- error 1288
 insert into v4 values (30);
 drop view v4, v3, v2, v1;
 drop table t1;
@@ -1685,3 +1685,18 @@ drop view v1;
 CREATE VIEW v1 AS SELECT SUBSTRING_INDEX("dkjhgd:kjhdjh", ":", 1);
 SELECT * FROM v1;
 drop view v1;
+
+#
+# hide underlying tables names in case of imposibility to update (BUG#10773)
+#
+create table t1 (f59 int, f60 int, f61 int);
+insert into t1 values (19,41,32);
+create view v1 as select f59, f60 from t1 where f59 in  
+         (select f59 from t1);
+-- error 1288
+update v1 set f60=2345;
+-- error 1423
+update t1 set f60=(select max(f60) from v1);
+drop view v1;
+drop table t1;
+

sql/mysql_priv.h

@@ -882,6 +882,9 @@ void add_join_on(TABLE_LIST *b,Item *expr);
 void add_join_natural(TABLE_LIST *a,TABLE_LIST *b);
 bool add_proc_to_list(THD *thd, Item *item);
 TABLE *unlink_open_table(THD *thd,TABLE *list,TABLE *find);
+void update_non_unique_table_error(TABLE_LIST *update,
+                                   const char *operation,
+                                   TABLE_LIST *duplicate);
 
 SQL_SELECT *make_select(TABLE *head, table_map const_tables,
 			table_map read_tables, COND *conds,

sql/share/errmsg.txt

@@ -5358,3 +5358,5 @@ ER_STMT_HAS_NO_OPEN_CURSOR
 	eng "The statement (%lu) has no open cursor."
 ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG
         eng "Explicit or implicit commit is not allowed in stored function or trigger."
+ER_VIEW_PREVENT_UPDATE
+        eng "The definition of table '%-.64s' prevents operation %s on table '%-.64s'."

sql/sql_base.cc

@@ -775,6 +775,60 @@ TABLE_LIST* unique_table(TABLE_LIST *table, TABLE_LIST *table_list)
 }
 
 
+/*
+  Issue correct error message in case we found 2 duplicate tables which
+  prevent some update operation
+
+  SYNOPSIS
+    update_non_unique_table_error()
+    update      table which we try to update
+    operation   name of update operation
+    duplicate   duplicate table which we found
+
+  NOTE:
+    here we hide view underlying tables if we have them
+*/
+
+void update_non_unique_table_error(TABLE_LIST *update,
+                                   const char *operation,
+                                   TABLE_LIST *duplicate)
+{
+  update= update->top_table();
+  duplicate= duplicate->top_table();
+  if (!update->view || !duplicate->view ||
+      update->view == duplicate->view ||
+      update->view_name.length != duplicate->view_name.length ||
+      update->view_db.length != duplicate->view_db.length ||
+      my_strcasecmp(table_alias_charset,
+                    update->view_name.str, duplicate->view_name.str) != 0 ||
+      my_strcasecmp(table_alias_charset,
+                    update->view_db.str, duplicate->view_db.str) != 0)
+  {
+    /*
+      it is not the same view repeated (but it can be parts of the same copy
+      of view), so we have to hide underlying tables.
+    */
+    if (update->view)
+    {
+      if (update->view == duplicate->view)
+        my_error(ER_NON_UPDATABLE_TABLE, MYF(0), update->alias, operation);
+      else
+        my_error(ER_VIEW_PREVENT_UPDATE, MYF(0),
+                 (duplicate->view ? duplicate->alias : update->alias),
+                 operation, update->alias);
+      return;
+    }
+    if (duplicate->view)
+    {
+      my_error(ER_VIEW_PREVENT_UPDATE, MYF(0), duplicate->alias, operation,
+               update->alias);
+      return;
+    }
+  }
+  my_error(ER_UPDATE_TABLE_USED, MYF(0), update->alias);
+}
+
+
 TABLE **find_temporary_table(THD *thd, const char *db, const char *table_name)
 {
   char	key[MAX_DBKEY_LENGTH];
@@ -3212,9 +3266,7 @@ bool setup_tables(THD *thd, TABLE_LIST *tables, Item **conds,
   {
     TABLE *table= table_list->table;
     if (first_select_table &&
-        (table_list->belong_to_view ?
-         table_list->belong_to_view :
-         table_list) == first_select_table)
+        table_list->top_table() == first_select_table)
     {
       /* new counting for SELECT of INSERT ... SELECT command */
       first_select_table= 0;

sql/sql_delete.cc

@@ -309,11 +309,14 @@ bool mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds)
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE");
     DBUG_RETURN(TRUE);
   }
-  if (unique_table(table_list, table_list->next_global))
   {
-    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->table_name);
+    TABLE_LIST *duplicate;
+    if ((duplicate= unique_table(table_list, table_list->next_global)))
+    {
+      update_non_unique_table_error(table_list, "DELETE", duplicate);
       DBUG_RETURN(TRUE);
     }
+  }
   select_lex->fix_prepare_information(thd, conds);
   DBUG_RETURN(FALSE);
 }
@@ -393,13 +396,17 @@ bool mysql_multi_delete_prepare(THD *thd)
       Check that table from which we delete is not used somewhere
       inside subqueries/view.
     */
-    if (unique_table(target_tbl->correspondent_table, lex->query_tables))
     {
-      my_error(ER_UPDATE_TABLE_USED, MYF(0),
-               target_tbl->correspondent_table->table_name);
+      TABLE_LIST *duplicate;
+      if ((duplicate= unique_table(target_tbl->correspondent_table,
+                                   lex->query_tables)))
+      {
+        update_non_unique_table_error(target_tbl->correspondent_table,
+                                      "DELETE", duplicate);
         DBUG_RETURN(TRUE);
       }
     }
+  }
   DBUG_RETURN(FALSE);
 }
 

sql/sql_insert.cc

@@ -778,11 +778,15 @@ bool mysql_prepare_insert(THD *thd, TABLE_LIST *table_list, TABLE *table,
   if (!table)
     table= table_list->table;
 
-  if (!select_insert && unique_table(table_list, table_list->next_global))
+  if (!select_insert)
   {
-    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->table_name);
+    TABLE_LIST *duplicate;
+    if ((duplicate= unique_table(table_list, table_list->next_global)))
+    {
+      update_non_unique_table_error(table_list, "INSERT", duplicate);
       DBUG_RETURN(TRUE);
     }
+  }
   if (duplic == DUP_UPDATE || duplic == DUP_REPLACE)
     table->file->extra(HA_EXTRA_RETRIEVE_PRIMARY_KEY);
   thd->lex->select_lex.first_execution= 0;

sql/sql_parse.cc

@@ -2845,13 +2845,16 @@ mysql_execute_command(THD *thd)
           Is table which we are changing used somewhere in other parts
           of query
         */
-        if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) &&
-            unique_table(create_table, select_tables))
+        if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
         {
-          my_error(ER_UPDATE_TABLE_USED, MYF(0), create_table->table_name);
+          TABLE_LIST *duplicate;
+          if ((duplicate= unique_table(create_table, select_tables)))
+          {
+            update_non_unique_table_error(create_table, "CREATE", duplicate);
             res= 1;
             goto end_with_restart_wait;
           }
+        }
         /* If we create merge table, we have to test tables in merge, too */
         if (lex->create_info.used_fields & HA_CREATE_USED_UNION)
         {
@@ -2860,9 +2863,10 @@ mysql_execute_command(THD *thd)
                tab;
                tab= tab->next_local)
           {
-            if (unique_table(tab, select_tables))
+            TABLE_LIST *duplicate;
+            if ((duplicate= unique_table(tab, select_tables)))
             {
-              my_error(ER_UPDATE_TABLE_USED, MYF(0), tab->table_name);
+              update_non_unique_table_error(tab, "CREATE", duplicate);
               res= 1;
               goto end_with_restart_wait;
             }

sql/sql_update.cc

@@ -566,11 +566,15 @@ bool mysql_prepare_update(THD *thd, TABLE_LIST *table_list,
     DBUG_RETURN(TRUE);
 
   /* Check that we are not using table that we are updating in a sub select */
-  if (unique_table(table_list, table_list->next_global))
   {
+    TABLE_LIST *duplicate;
+    if ((duplicate= unique_table(table_list, table_list->next_global)))
+    {
+      update_non_unique_table_error(table_list, "UPDATE", duplicate);
       my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->table_name);
       DBUG_RETURN(TRUE);
     }
+  }
   select_lex->fix_prepare_information(thd, conds);
   DBUG_RETURN(FALSE);
 }
@@ -781,7 +785,7 @@ bool mysql_multi_update_prepare(THD *thd)
   {
     TABLE *table= tl->table;
     TABLE_LIST *tlist;
-    if (!(tlist= tl->belong_to_view ? tl->belong_to_view : tl)->derived)
+    if (!(tlist= tl->top_table())->derived)
     {
       tlist->grant.want_privilege=
         (SELECT_ACL & ~tlist->grant.privilege);
@@ -790,13 +794,16 @@ bool mysql_multi_update_prepare(THD *thd)
     DBUG_PRINT("info", ("table: %s  want_privilege: %u", tl->alias,
                         (uint) table->grant.want_privilege));
     if (tl->lock_type != TL_READ &&
-        tl->lock_type != TL_READ_NO_INSERT &&
-        unique_table(tl, table_list))
+        tl->lock_type != TL_READ_NO_INSERT)
     {
-      my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->table_name);
+      TABLE_LIST *duplicate;
+      if ((duplicate= unique_table(tl, table_list)))
+      {
+        update_non_unique_table_error(table_list, "UPDATE", duplicate);
         DBUG_RETURN(TRUE);
       }
     }
+  }
 
   if (thd->fill_derived_tables() &&
       mysql_handle_derived(lex, &mysql_derived_filling))

sql/sql_view.cc

@@ -720,9 +720,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
   }
   if (!res && !thd->is_fatal_error)
   {
-    TABLE_LIST *top_view= (table->belong_to_view ?
-                           table->belong_to_view :
-                           table);
+    TABLE_LIST *top_view= table->top_table();
     TABLE_LIST *view_tables= lex->query_tables;
     TABLE_LIST *view_tables_tail= 0;
     TABLE_LIST *tbl;
@@ -1072,8 +1070,7 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
       thd->lex->select_lex.select_limit == 0)
     DBUG_RETURN(FALSE); /* it is normal table or query without LIMIT */
   table= view->table;
-  if (view->belong_to_view)
-    view= view->belong_to_view;
+  view= view->top_table();
   trans= view->field_translation;
   key_info_end= (key_info= table->key_info)+ table->s->keys;
 

sql/table.cc

@@ -2118,7 +2118,7 @@ int st_table_list::view_check_option(THD *thd, bool ignore_failure)
 {
   if (check_option && check_option->val_int() == 0)
   {
-    TABLE_LIST *view= (belong_to_view ? belong_to_view : this);
+    TABLE_LIST *view= top_table();
     if (ignore_failure)
     {
       push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_ERROR,

sql/table.h

@@ -459,6 +459,8 @@ typedef struct st_table_list
                           st_table_list *view);
   bool set_insert_values(MEM_ROOT *mem_root);
   st_table_list *find_underlying_table(TABLE *table);
+  inline st_table_list *top_table()
+    { return belong_to_view ? belong_to_view : this; }
 } TABLE_LIST;
 
 class Item;