resolve UPDATE fields belonged to VIEWs as Item_field (instead of Item_ref) in...

resolve UPDATE fields belonged to VIEWs as Item_field (instead of Item_ref) in prepared statements, too (BUG#4999)

mysql-test/r/view.result

@@ -1014,3 +1014,25 @@ p2
 p4
 drop view v1;
 drop table t1;
+create table t1 (a int);
+create view v1 as select a from t1;
+insert into t1 values (1);
+SET @v0 = '2';
+PREPARE stmt FROM 'UPDATE v1 SET a = ?';
+EXECUTE stmt USING @v0;
+DEALLOCATE PREPARE stmt;
+SET @v0 = '3';
+PREPARE stmt FROM 'insert into v1 values (?)';
+EXECUTE stmt USING @v0;
+DEALLOCATE PREPARE stmt;
+SET @v0 = '4';
+PREPARE stmt FROM 'insert into v1 (a) values (?)';
+EXECUTE stmt USING @v0;
+DEALLOCATE PREPARE stmt;
+select * from t1;
+a
+2
+3
+4
+drop view v1;
+drop table t1;

mysql-test/t/view.test

@@ -943,3 +943,33 @@ select distinct first.col2 from t1 first where first.col2 in (select second.col2
 select distinct first.col2 from v1 first where first.col2 in (select second.col2 from t1 second where second.col1<>first.col1);
 drop view v1;
 drop table t1;
+
+#
+# Test of view updatebility in prepared statement
+#
+create table t1 (a int);
+create view v1 as select a from t1;
+insert into t1 values (1);
+
+#update
+SET @v0 = '2';
+PREPARE stmt FROM 'UPDATE v1 SET a = ?';
+EXECUTE stmt USING @v0;
+DEALLOCATE PREPARE stmt;
+
+#insert without field list
+SET @v0 = '3';
+PREPARE stmt FROM 'insert into v1 values (?)';
+EXECUTE stmt USING @v0;
+DEALLOCATE PREPARE stmt;
+
+#insert with field list
+SET @v0 = '4';
+PREPARE stmt FROM 'insert into v1 (a) values (?)';
+EXECUTE stmt USING @v0;
+DEALLOCATE PREPARE stmt;
+
+select * from t1;
+
+drop view v1;
+drop table t1;

sql/sql_prepare.cc

@@ -978,11 +978,19 @@ static int mysql_test_update(Prepared_statement *stmt,
 				    select->order_list.elements,
 				    (ORDER *) select->order_list.first)))
     {
-      if (setup_fields(thd, 0, table_list,
-		       select->item_list, 1, 0, 0) ||
-	  setup_fields(thd, 0, table_list,
-		       stmt->lex->value_list, 0, 0, 0))
-	res= -1;
+      thd->lex->select_lex.no_wrap_view_item= 1;
+      if (setup_fields(thd, 0, table_list, select->item_list, 1, 0, 0))
+      {
+        res= -1;
+        thd->lex->select_lex.no_wrap_view_item= 0;
+      }
+      else
+      {
+        thd->lex->select_lex.no_wrap_view_item= 0;
+        if (setup_fields(thd, 0, table_list,
+                         stmt->lex->value_list, 0, 0, 0))
+          res= -1;
+      }
     }
     stmt->lex->unit.cleanup();
   }