diff --git a/mysql-test/r/func_group.result b/mysql-test/r/func_group.result
index 1e130877088..4785ca9919d 100644
--- a/mysql-test/r/func_group.result
+++ b/mysql-test/r/func_group.result
@@ -1407,4 +1407,16 @@ SELECT COUNT(*), a FROM t1;
 COUNT(*)	a
 4	1
 DROP TABLE t1;
+set SQL_MODE=ONLY_FULL_GROUP_BY;
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2),(3),(4);
+CREATE VIEW v1 AS SELECT a,(a + 1) AS y FROM t1;
+EXPLAIN EXTENDED SELECT y FROM v1 GROUP BY v1.y;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	Using temporary; Using filesort
+Warnings:
+Note	1003	select (`test`.`t1`.`a` + 1) AS `y` from `test`.`t1` group by (`test`.`t1`.`a` + 1)
+DROP VIEW v1;
+DROP TABLE t1;
+SET SQL_MODE=DEFAULT;
 End of 5.0 tests
diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result
index f6487ae3ddf..75df77b0790 100644
--- a/mysql-test/r/subselect.result
+++ b/mysql-test/r/subselect.result
@@ -4383,4 +4383,13 @@ SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a) UNION
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UNION 
 (SELECT 1 FROM t2 WHERE t1.a = t2.a))' at line 2
 DROP TABLE t1,t2;
+create table t1(f11 int, f12 int);
+create table t2(f21 int unsigned not null, f22 int, f23 varchar(10));
+insert into t1 values(1,1),(2,2), (3, 3);
+set session sort_buffer_size= 33*1024;
+select count(*) from t1 where f12 = 
+(select f22 from t2 where f22 = f12 order by f21 desc, f22, f23 limit 1);
+count(*)
+3
+drop table t1,t2;
 End of 5.0 tests.
diff --git a/mysql-test/r/type_decimal.result b/mysql-test/r/type_decimal.result
index a438755ce6b..a2ccf042165 100644
--- a/mysql-test/r/type_decimal.result
+++ b/mysql-test/r/type_decimal.result
@@ -786,10 +786,6 @@ from (select 1 as s,'t' as t union select null, null ) as sub1;
 select group_concat(t) from t1 group by week(date)/10;
 group_concat(t)
 t
-Warnings:
-Warning	1292	Truncated incorrect datetime value: '0000-00-00'
-Warning	1292	Truncated incorrect datetime value: '0000-00-00'
-Warning	1292	Truncated incorrect datetime value: '0000-00-00'
 drop table t1;
 CREATE TABLE t1 (
 qty decimal(16,6) default NULL, 
diff --git a/mysql-test/t/func_group.test b/mysql-test/t/func_group.test
index 25cb13a2f75..75a380c733f 100644
--- a/mysql-test/t/func_group.test
+++ b/mysql-test/t/func_group.test
@@ -901,5 +901,20 @@ SELECT COUNT(*), a FROM t1;
 
 DROP TABLE t1;
 
+#
+# Bug #33133: Views are not transparent
+#
+
+set SQL_MODE=ONLY_FULL_GROUP_BY;
+
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2),(3),(4);
+CREATE VIEW v1 AS SELECT a,(a + 1) AS y FROM t1;
+EXPLAIN EXTENDED SELECT y FROM v1 GROUP BY v1.y;
+
+DROP VIEW v1;
+DROP TABLE t1;
+SET SQL_MODE=DEFAULT;
+
 ###
 --echo End of 5.0 tests
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index ea080964058..88e4f683e9e 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -3230,4 +3230,26 @@ SELECT 2 FROM t1 WHERE EXISTS ((SELECT 1 FROM t2 WHERE t1.a=t2.a) UNION
 DROP TABLE t1,t2;
 
 
+#
+# Bug#33675: Usage of an uninitialized memory by filesort in a subquery
+#            caused server crash.
+#
+create table t1(f11 int, f12 int);
+create table t2(f21 int unsigned not null, f22 int, f23 varchar(10));
+insert into t1 values(1,1),(2,2), (3, 3);
+let $i=10000;
+--disable_query_log
+--disable_warnings
+while ($i)
+{
+  eval insert into t2 values (-1 , $i/5000 + 1, '$i');
+  dec $i;
+}
+--enable_warnings
+--enable_query_log
+set session sort_buffer_size= 33*1024;
+select count(*) from t1 where f12 = 
+(select f22 from t2 where f22 = f12 order by f21 desc, f22, f23 limit 1);
+
+drop table t1,t2;
 --echo End of 5.0 tests.
diff --git a/sql/field.h b/sql/field.h
index e2dd6d8538e..d681229a9fd 100644
--- a/sql/field.h
+++ b/sql/field.h
@@ -962,6 +962,10 @@ public:
     :Field_str(ptr_arg, 10, null_ptr_arg, null_bit_arg,
 	       unireg_check_arg, field_name_arg, table_arg, cs)
     {}
+  Field_newdate(bool maybe_null_arg, const char *field_name_arg,
+                struct st_table *table_arg, CHARSET_INFO *cs)
+    :Field_str((char*) 0,10, maybe_null_arg ? (uchar*) "": 0,0,
+               NONE, field_name_arg, table_arg, cs) {}
   enum_field_types type() const { return FIELD_TYPE_DATE;}
   enum_field_types real_type() const { return FIELD_TYPE_NEWDATE; }
   enum ha_base_keytype key_type() const { return HA_KEYTYPE_UINT24; }
diff --git a/sql/filesort.cc b/sql/filesort.cc
index 08ffa2211fa..5a8e3627758 100644
--- a/sql/filesort.cc
+++ b/sql/filesort.cc
@@ -37,7 +37,8 @@ if (my_b_write((file),(byte*) (from),param->ref_length)) \
 
 static char **make_char_array(char **old_pos, register uint fields,
                               uint length, myf my_flag);
-static BUFFPEK *read_buffpek_from_file(IO_CACHE *buffer_file, uint count);
+static byte *read_buffpek_from_file(IO_CACHE *buffer_file, uint count,
+                                    byte *buf);
 static ha_rows find_all_keys(SORTPARAM *param,SQL_SELECT *select,
 			     uchar * *sort_keys, IO_CACHE *buffer_file,
 			     IO_CACHE *tempfile,IO_CACHE *indexfile);
@@ -238,9 +239,10 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length,
   }
   else
   {
-    if (!table_sort.buffpek && table_sort.buffpek_len < maxbuffer &&
-        !(table_sort.buffpek=
-          (byte *) read_buffpek_from_file(&buffpek_pointers, maxbuffer)))
+    if (!(table_sort.buffpek=
+          read_buffpek_from_file(&buffpek_pointers, maxbuffer,
+                                 (table_sort.buffpek_len < maxbuffer ?
+                                  NULL : table_sort.buffpek))))
       goto err;
     buffpek= (BUFFPEK *) table_sort.buffpek;
     table_sort.buffpek_len= maxbuffer;
@@ -368,18 +370,20 @@ static char **make_char_array(char **old_pos, register uint fields,
 
 /* Read 'count' number of buffer pointers into memory */
 
-static BUFFPEK *read_buffpek_from_file(IO_CACHE *buffpek_pointers, uint count)
+static byte *read_buffpek_from_file(IO_CACHE *buffpek_pointers, uint count,
+                                    byte *buf)
 {
-  ulong length;
-  BUFFPEK *tmp;
+  ulong length= sizeof(BUFFPEK)*count;
+  byte *tmp= buf;
   DBUG_ENTER("read_buffpek_from_file");
   if (count > UINT_MAX/sizeof(BUFFPEK))
     return 0; /* sizeof(BUFFPEK)*count will overflow */
-  tmp=(BUFFPEK*) my_malloc(length=sizeof(BUFFPEK)*count, MYF(MY_WME));
+  if (!tmp)
+    tmp= (byte *)my_malloc(length, MYF(MY_WME));
   if (tmp)
   {
     if (reinit_io_cache(buffpek_pointers,READ_CACHE,0L,0,0) ||
-	my_b_read(buffpek_pointers, (byte*) tmp, length))
+	my_b_read(buffpek_pointers, tmp, length))
     {
       my_free((char*) tmp, MYF(0));
       tmp=0;
diff --git a/sql/item.cc b/sql/item.cc
index 2d49c7b6d60..cafa40ecbb0 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -4384,7 +4384,7 @@ Field *Item::tmp_table_field_from_field_type(TABLE *table)
 			    name, table, 0, unsigned_flag);
   case MYSQL_TYPE_NEWDATE:
   case MYSQL_TYPE_DATE:
-    return new Field_date(maybe_null, name, table, &my_charset_bin);
+    return new Field_newdate(maybe_null, name, table, &my_charset_bin);
   case MYSQL_TYPE_TIME:
     return new Field_time(maybe_null, name, table, &my_charset_bin);
   case MYSQL_TYPE_TIMESTAMP:
diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 7d00de493aa..3d261dc2c36 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -628,7 +628,7 @@ Field *Item_sum_hybrid::create_tmp_field(bool group, TABLE *table,
   */
   switch (args[0]->field_type()) {
   case MYSQL_TYPE_DATE:
-    return new Field_date(maybe_null, name, table, collation.collation);
+    return new Field_newdate(maybe_null, name, table, collation.collation);
   case MYSQL_TYPE_TIME:
     return new Field_time(maybe_null, name, table, collation.collation);
   case MYSQL_TYPE_TIMESTAMP:
diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc
index 04060d190a0..0cb3c963dad 100644
--- a/sql/item_timefunc.cc
+++ b/sql/item_timefunc.cc
@@ -3303,7 +3303,7 @@ Field *Item_func_str_to_date::tmp_table_field(TABLE *t_arg)
   if (cached_field_type == MYSQL_TYPE_TIME)
     return (new Field_time(maybe_null, name, t_arg, &my_charset_bin));
   if (cached_field_type == MYSQL_TYPE_DATE)
-    return (new Field_date(maybe_null, name, t_arg, &my_charset_bin));
+    return (new Field_newdate(maybe_null, name, t_arg, &my_charset_bin));
   if (cached_field_type == MYSQL_TYPE_DATETIME)
     return (new Field_datetime(maybe_null, name, t_arg, &my_charset_bin));
   return (new Field_string(max_length, maybe_null, name, t_arg, &my_charset_bin));
diff --git a/sql/item_timefunc.h b/sql/item_timefunc.h
index b647e93b700..7960c03d2e5 100644
--- a/sql/item_timefunc.h
+++ b/sql/item_timefunc.h
@@ -340,7 +340,7 @@ public:
   }
   Field *tmp_table_field(TABLE *t_arg)
   {
-    return (new Field_date(maybe_null, name, t_arg, &my_charset_bin));
+    return (new Field_newdate(maybe_null, name, t_arg, &my_charset_bin));
   }  
   bool result_as_longlong() { return TRUE; }
   my_decimal *val_decimal(my_decimal *decimal_value)
@@ -784,7 +784,7 @@ public:
   enum_field_types field_type() const { return MYSQL_TYPE_DATE; }
   Field *tmp_table_field(TABLE *t_arg)
   {
-    return (new Field_date(maybe_null, name, t_arg, &my_charset_bin));
+    return (new Field_newdate(maybe_null, name, t_arg, &my_charset_bin));
   }  
   void fix_length_and_dec()
   {
@@ -884,7 +884,7 @@ public:
   }
   Field *tmp_table_field(TABLE *t_arg)
   {
-    return (new Field_date(maybe_null, name, t_arg, &my_charset_bin));
+    return (new Field_newdate(maybe_null, name, t_arg, &my_charset_bin));
   }
   longlong val_int();
   my_decimal *val_decimal(my_decimal *decimal_value)
diff --git a/sql/sql_base.cc b/sql/sql_base.cc
index e79e4db31d2..8190b3eeacd 100644
--- a/sql/sql_base.cc
+++ b/sql/sql_base.cc
@@ -4254,7 +4254,36 @@ find_item_in_list(Item *find, List<Item> &items, uint *counter,
         *resolution= RESOLVED_IGNORING_ALIAS;
         break;
       }
-    } 
+    }
+    else if (table_name && item->type() == Item::REF_ITEM &&
+             ((Item_ref *)item)->ref_type() == Item_ref::VIEW_REF)
+    {
+      /*
+        TODO:Here we process prefixed view references only. What we should 
+        really do is process all types of Item_refs. But this will currently 
+        lead to a clash with the way references to outer SELECTs (from the 
+        HAVING clause) are handled in e.g. :
+        SELECT 1 FROM t1 AS t1_o GROUP BY a
+          HAVING (SELECT t1_o.a FROM t1 AS t1_i GROUP BY t1_i.a LIMIT 1).
+        Processing all Item_refs here will cause t1_o.a to resolve to itself.
+        We still need to process the special case of Item_direct_view_ref 
+        because in the context of views they have the same meaning as 
+        Item_field for tables.
+      */
+      Item_ident *item_ref= (Item_ident *) item;
+      if (item_ref->name && item_ref->table_name &&
+          !my_strcasecmp(system_charset_info, item_ref->name, field_name) &&
+          !my_strcasecmp(table_alias_charset, item_ref->table_name,
+                         table_name) &&
+          (!db_name || (item_ref->db_name && 
+                        !strcmp (item_ref->db_name, db_name))))
+      {
+        found= li.ref();
+        *counter= i;
+        *resolution= RESOLVED_IGNORING_ALIAS;
+        break;
+      }
+    }
   }
   if (!found)
   {