Moving LP BUG#794005 to 5.3 + fixing INSERT of multi-table view.

mysql-test/r/view.result

@@ -3930,6 +3930,63 @@ drop table t1,t2;
 # -- End of 5.1 tests.
 # -----------------------------------------------------------------
 #
+# Bug #794005: crash in st_table::mark_virtual_columns_for_write
+#
+CREATE TABLE t1 (a int);
+insert into t1 values (1);
+CREATE TABLE t2 (a int);
+insert into t2 values (1);
+CREATE VIEW v2 AS SELECT * FROM t2;
+CREATE VIEW v1 AS SELECT * FROM v2;
+CREATE VIEW v3 AS SELECT t2.a,v1.a as b FROM t2,v1 where t2.a=v1.a;
+CREATE OR REPLACE ALGORITHM = TEMPTABLE VIEW v2 AS SELECT * FROM t1;
+UPDATE v1 SET a = 10;
+ERROR HY000: The target table v1 of the UPDATE is not updatable
+REPLACE v1 SET a = 10;
+ERROR HY000: The target table v1 of the INSERT is not insertable-into
+INSERT into v1 values (20);
+ERROR HY000: The target table v1 of the INSERT is not insertable-into
+DELETE from v1;
+ERROR HY000: The target table v1 of the DELETE is not updatable
+UPDATE v3 SET b= 10;
+ERROR HY000: The target table v2 of the UPDATE is not updatable
+REPLACE v3 SET b= 10;
+ERROR HY000: The target table v3 of the INSERT is not insertable-into
+INSERT into v3(b) values (20);
+ERROR HY000: The target table v3 of the INSERT is not insertable-into
+DELETE from v3 where b=20;
+ERROR HY000: Can not delete from join view 'test.v3'
+DELETE from v3 where a=20;
+ERROR HY000: Can not delete from join view 'test.v3'
+DELETE v1 from v1,t1 where v1.a=t1.a;
+ERROR HY000: The target table v1 of the DELETE is not updatable
+UPDATE v3 SET a = 10;
+REPLACE v3 SET a = 11;
+INSERT INTO v3(a) values (20);
+select * from t1;
+a
+1
+select * from t2;
+a
+10
+11
+20
+CREATE OR REPLACE ALGORITHM = MERGE VIEW v2 AS SELECT * FROM t2;
+DELETE from v1 where a=11;
+DELETE v1 from v1,t1 where v1.a=t1.a;
+select * from t1;
+a
+1
+select * from t2;
+a
+10
+20
+DROP VIEW v1,v2,v3;
+DROP TABLE t1,t2;
+# -----------------------------------------------------------------
+# -- End of 5.2 tests.
+# -----------------------------------------------------------------
+#
 # Bug #59696 Optimizer does not use equalities for conditions over view 
 #
 CREATE TABLE t1 (a int NOT NULL);
@@ -4376,4 +4433,7 @@ NULL	NULL	1	0
 NULL	NULL	1	0
 DROP VIEW v2;
 DROP TABLE t1, t2, t3;
+# -----------------------------------------------------------------
+# -- End of 5.3 tests.
+# -----------------------------------------------------------------
 SET optimizer_switch=@save_optimizer_switch;

mysql-test/t/view.test

@@ -3980,6 +3980,60 @@ drop table t1,t2;
 --echo # -----------------------------------------------------------------
 --echo # -- End of 5.1 tests.
 --echo # -----------------------------------------------------------------
+--echo #
+--echo # Bug #794005: crash in st_table::mark_virtual_columns_for_write
+--echo #
+
+CREATE TABLE t1 (a int);
+insert into t1 values (1);
+CREATE TABLE t2 (a int);
+insert into t2 values (1);
+
+CREATE VIEW v2 AS SELECT * FROM t2;
+CREATE VIEW v1 AS SELECT * FROM v2;
+CREATE VIEW v3 AS SELECT t2.a,v1.a as b FROM t2,v1 where t2.a=v1.a;
+CREATE OR REPLACE ALGORITHM = TEMPTABLE VIEW v2 AS SELECT * FROM t1;
+
+--error ER_NON_UPDATABLE_TABLE
+UPDATE v1 SET a = 10;
+--error ER_NON_INSERTABLE_TABLE
+REPLACE v1 SET a = 10;
+--error ER_NON_INSERTABLE_TABLE
+INSERT into v1 values (20);
+--error ER_NON_UPDATABLE_TABLE
+DELETE from v1;
+--error ER_NON_UPDATABLE_TABLE
+UPDATE v3 SET b= 10;
+--error ER_NON_INSERTABLE_TABLE
+REPLACE v3 SET b= 10;
+--error ER_NON_INSERTABLE_TABLE
+INSERT into v3(b) values (20);
+--error ER_VIEW_DELETE_MERGE_VIEW
+DELETE from v3 where b=20;
+--error ER_VIEW_DELETE_MERGE_VIEW
+DELETE from v3 where a=20;
+--error ER_NON_UPDATABLE_TABLE
+DELETE v1 from v1,t1 where v1.a=t1.a;
+UPDATE v3 SET a = 10;
+REPLACE v3 SET a = 11;
+INSERT INTO v3(a) values (20);
+
+select * from t1;
+select * from t2;
+
+CREATE OR REPLACE ALGORITHM = MERGE VIEW v2 AS SELECT * FROM t2;
+DELETE from v1 where a=11;
+DELETE v1 from v1,t1 where v1.a=t1.a;
+select * from t1;
+select * from t2;
+
+DROP VIEW v1,v2,v3;
+DROP TABLE t1,t2;
+
+--echo # -----------------------------------------------------------------
+--echo # -- End of 5.2 tests.
+--echo # -----------------------------------------------------------------
+
 --echo #
 --echo # Bug #59696 Optimizer does not use equalities for conditions over view 
 --echo #
@@ -4311,4 +4365,8 @@ SELECT * FROM t1 RIGHT JOIN v2 ON ( v2.a = t1.a ) WHERE v2.b IN ( SELECT b FROM
 DROP VIEW v2;
 DROP TABLE t1, t2, t3;
 
+--echo # -----------------------------------------------------------------
+--echo # -- End of 5.3 tests.
+--echo # -----------------------------------------------------------------
+
 SET optimizer_switch=@save_optimizer_switch;

sql/item.cc

@@ -9147,14 +9147,18 @@ table_map Item_direct_view_ref::used_tables() const
 {
   return get_depended_from() ?
          OUTER_REF_TABLE_BIT :
-         (view->merged ? (*ref)->used_tables() : view->table->map); 
+         ((view->merged || !view->table) ?
+          (*ref)->used_tables() :
+          view->table->map);
 }
 
 table_map Item_direct_view_ref::not_null_tables() const
 {
   return get_depended_from() ?
          0 :
-         (view->merged ? (*ref)->not_null_tables() : view->table->map); 
+         ((view->merged || !view->table) ?
+          (*ref)->not_null_tables() :
+          view->table->map);
 }
 
 /*

sql/sql_base.cc

@@ -7927,6 +7927,7 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
     while ((table_list= ti++))
     {
       TABLE *table= table_list->table;
+      if (table)
         table->pos_in_table_list= table_list;
       if (first_select_table &&
           table_list->top_table() == first_select_table)
@@ -7940,7 +7941,7 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
       {
         table_list->jtbm_table_no= tablenr;
       }
-      else
+      else if (table)
       {
         table->pos_in_table_list= table_list;
         setup_table_map(table, table_list, tablenr);

sql/sql_delete.cc

@@ -68,7 +68,7 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
   if (mysql_handle_list_of_derived(thd->lex, table_list, DT_PREPARE))
     DBUG_RETURN(TRUE);
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
      my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE");
      DBUG_RETURN(TRUE);
@@ -526,7 +526,8 @@ int mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds)
       setup_conds(thd, table_list, select_lex->leaf_tables, conds) ||
       setup_ftfuncs(select_lex))
     DBUG_RETURN(TRUE);
-  if (!table_list->updatable || check_key_in_view(thd, table_list))
+  if (!table_list->single_table_updatable() ||
+      check_key_in_view(thd, table_list))
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE");
     DBUG_RETURN(TRUE);
@@ -622,7 +623,7 @@ int mysql_multi_delete_prepare(THD *thd)
        DBUG_RETURN(TRUE);
     }
 
-    if (!target_tbl->correspondent_table->updatable ||
+    if (!target_tbl->correspondent_table->single_table_updatable() ||
         check_key_in_view(thd, target_tbl->correspondent_table))
     {
       my_error(ER_NON_UPDATABLE_TABLE, MYF(0),

sql/sql_derived.cc

@@ -483,7 +483,7 @@ bool mysql_derived_merge_for_insert(THD *thd, LEX *lex, TABLE_LIST *derived)
     return mysql_derived_prepare(thd, lex, derived);
   if (!derived->is_multitable())
   {
-    if (!derived->updatable)
+    if (!derived->single_table_updatable())
       return derived->create_field_translation(thd);
     if (derived->merge_underlying_list)
     {

sql/sql_insert.cc

@@ -103,7 +103,8 @@ static bool check_view_insertability(THD *thd, TABLE_LIST *view);
 */
 
 bool check_view_single_update(List<Item> &fields, List<Item> *values,
-                              TABLE_LIST *view, table_map *map)
+                              TABLE_LIST *view, table_map *map,
+                              bool insert)
 {
   /* it is join view => we need to find the table for update */
   List_iterator_fast<Item> it(fields);
@@ -140,6 +141,14 @@ bool check_view_single_update(List<Item> &fields, List<Item> *values,
   */
   tbl->table->insert_values= view->table->insert_values;
   view->table= tbl->table;
+  if (!tbl->single_table_updatable())
+  {
+    if (insert)
+      my_error(ER_NON_INSERTABLE_TABLE, MYF(0), view->alias, "INSERT");
+    else
+      my_error(ER_NON_UPDATABLE_TABLE, MYF(0), view->alias, "UPDATE");
+    return TRUE;
+  }
   *map= tables;
 
   return FALSE;
@@ -184,7 +193,7 @@ static int check_insert_fields(THD *thd, TABLE_LIST *table_list,
 {
   TABLE *table= table_list->table;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_INSERTABLE_TABLE, MYF(0), table_list->alias, "INSERT");
     return -1;
@@ -260,7 +269,7 @@ static int check_insert_fields(THD *thd, TABLE_LIST *table_list,
       if (check_view_single_update(fields, 
                                    fields_and_values_from_different_maps ?
                                    (List<Item>*) 0 : &values,
-                                   table_list, map))
+                                   table_list, map, true))
         return -1;
       table= table_list->table;
     }
@@ -347,7 +356,7 @@ static int check_update_fields(THD *thd, TABLE_LIST *insert_table_list,
   if (insert_table_list->is_view() &&
       insert_table_list->is_merged_derived() &&
       check_view_single_update(update_fields, &update_values,
-                               insert_table_list, map))
+                               insert_table_list, map, false))
     return -1;
 
   if (table->timestamp_field)
@@ -1159,7 +1168,7 @@ static bool mysql_prepare_insert_check_table(THD *thd, TABLE_LIST *table_list,
   bool insert_into_view= (table_list->view != 0);
   DBUG_ENTER("mysql_prepare_insert_check_table");
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_INSERTABLE_TABLE, MYF(0), table_list->alias, "INSERT");
     DBUG_RETURN(TRUE);

sql/sql_load.cc

@@ -187,7 +187,7 @@ int mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
                                     INSERT_ACL | UPDATE_ACL, FALSE))
      DBUG_RETURN(-1);
   if (!table_list->table ||               // do not suport join view
-      !table_list->updatable ||           // and derived tables
+      !table_list->single_table_updatable() || // and derived tables
       check_key_in_view(thd, table_list))
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "LOAD");

sql/sql_prepare.cc

@@ -1274,7 +1274,7 @@ static int mysql_test_update(Prepared_statement *stmt,
   if (table_list->handle_derived(thd->lex, DT_PREPARE))
     goto error;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "UPDATE");
     goto error;
@@ -1348,7 +1348,7 @@ static bool mysql_test_delete(Prepared_statement *stmt,
   if (mysql_handle_derived(thd->lex, DT_PREPARE))
     goto error;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE");
     goto error;

sql/sql_update.cc

@@ -257,7 +257,7 @@ int mysql_update(THD *thd,
   thd_proc_info(thd, "init");
   table= table_list->table;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "UPDATE");
     DBUG_RETURN(1);
@@ -1090,7 +1090,7 @@ reopen_tables:
     /* if table will be updated then check that it is unique */
     if (table->map & tables_for_update)
     {
-      if (!tl->updatable || check_key_in_view(thd, tl))
+      if (!tl->single_table_updatable() || check_key_in_view(thd, tl))
       {
         my_error(ER_NON_UPDATABLE_TABLE, MYF(0), tl->alias, "UPDATE");
         DBUG_RETURN(TRUE);

sql/table.cc

@@ -3712,6 +3712,28 @@ bool TABLE_LIST::prep_where(THD *thd, Item **conds,
   DBUG_RETURN(FALSE);
 }
 
+/**
+  Check that table/view is updatable and if it has single
+  underlying tables/views it is also updatable
+
+  @return Result of the check.
+*/
+
+bool TABLE_LIST::single_table_updatable()
+{
+  if (!updatable)
+    return false;
+  if (view_tables && view_tables->elements == 1)
+  {
+    /*
+      We need to check deeply only single table views. Multi-table views
+      will be turned to multi-table updates and then checked by leaf tables
+    */
+    return view_tables->head()->single_table_updatable();
+  }
+  return true;
+}
+
 
 /*
   Merge ON expressions for a view
@@ -5185,6 +5207,9 @@ void st_table::mark_virtual_columns_for_write(bool insert_fl)
   Field **vfield_ptr, *tmp_vfield;
   bool bitmap_updated= FALSE;
 
+  if (!vfield)
+    return;
+
   if (!vfield)
     return;
 

sql/table.h

@@ -1797,6 +1797,9 @@ struct TABLE_LIST
   int fetch_number_of_rows();
   bool change_refs_to_fields();
 
+
+  bool single_table_updatable();
+
 private:
   bool prep_check_option(THD *thd, uint8 check_opt_type);
   bool prep_where(THD *thd, Item **conds, bool no_where_clause);