merging

mysql-test/r/derived.result:
  Auto merged
mysql-test/t/derived.test:
  Auto merged

heap/hp_open.c

@@ -99,8 +99,8 @@ HP_INFO *heap_open(const char *name, int mode, uint keys, HP_KEYDEF *keydef,
 
       if (keydef[i].algorithm == HA_KEY_ALG_BTREE)
       {
-	init_tree(&keyinfo->rb_tree, 0, 0, 0, (qsort_cmp2)keys_compare, 1, 
-		  NULL, NULL);
+	init_tree(&keyinfo->rb_tree, 0, 0, sizeof(byte*), 
+		  (qsort_cmp2)keys_compare, 1, NULL, NULL);
 	keyinfo->delete_key= hp_rb_delete_key;
 	keyinfo->write_key= hp_rb_write_key;
 	nsegs++;

heap/hp_write.c

@@ -96,22 +96,23 @@ int hp_rb_write_key(HP_INFO *info, HP_KEYDEF *keyinfo, const byte *record,
   info->last_pos= NULL; /* For heap_rnext/heap_rprev */
   custom_arg.keyseg= keyinfo->seg;
   custom_arg.key_length= hp_rb_make_key(keyinfo, info->recbuf, record, recpos);
-  if ((keyinfo->flag & HA_NOSAME) &&
-      (!(keyinfo->flag & HA_NULL_PART_KEY) ||
-       !hp_if_null_in_key(keyinfo, record)))
+  if (keyinfo->flag & HA_NOSAME)
   {
     custom_arg.search_flag= SEARCH_FIND | SEARCH_SAME;
-    if (tree_search_key(&keyinfo->rb_tree, info->recbuf, info->parents, 
-	&info->last_pos, 0, &custom_arg))
-    {
-      my_errno= HA_ERR_FOUND_DUPP_KEY;
-      return 1;
-    }
+    keyinfo->rb_tree.flag= TREE_NO_DUPS;
   }
-  custom_arg.search_flag= SEARCH_SAME;
-  return tree_insert(&keyinfo->rb_tree, (void*)info->recbuf,
-		     custom_arg.key_length + sizeof(byte*),
-		     &custom_arg) ? 0 : 1;
+  else
+  {
+    custom_arg.search_flag= SEARCH_SAME;
+    keyinfo->rb_tree.flag= 0;
+  }
+  if (!tree_insert(&keyinfo->rb_tree, (void*)info->recbuf,
+		   custom_arg.key_length, &custom_arg))
+  {
+    my_errno= HA_ERR_FOUND_DUPP_KEY;
+    return 1;
+  }
+  return 0;
 }
 
 	/* Find where to place new record */

include/my_tree.h

@@ -27,6 +27,8 @@ extern "C" {
 
 #define tree_set_pointer(element,ptr) *((byte **) (element+1))=((byte*) (ptr))
 
+#define TREE_NO_DUPS 1
+
 typedef enum { left_root_right, right_root_left } TREE_WALK;
 typedef uint32 element_count;
 typedef int (*tree_walk_action)(void *,element_count,void *);
@@ -55,10 +57,11 @@ typedef struct st_tree {
   TREE_ELEMENT **parents[MAX_TREE_HEIGHT];
   uint offset_to_key,elements_in_tree,size_of_element,memory_limit,allocated;
   qsort_cmp2 compare;
-  void* custom_arg;
+  void *custom_arg;
   MEM_ROOT mem_root;
   my_bool with_delete;
   tree_element_free free;
+  uint flag;
 } TREE;
 
 	/* Functions on whole tree */

mysql-test/r/derived.result

@@ -7,6 +7,10 @@ select t1.a,t3.y from t1,(select a as y from t2  where b='c') as t3  where t1.a
 a	y
 3	3
 3	3
+select t1.a,t3.a from t1,(select * from t2  where b='c') as t3  where t1.a = t3.a;
+a	a
+3	3
+3	3
 CREATE TABLE t3 (a int not null, b char (10) not null);
 insert into t3 values (3,'f'),(4,'y'),(5,'z'),(6,'c');
 select t1.a,t4.y from t1,(select t2.a as y from t2,(select t3.b from t3 where t3.a>3) as t5  where t2.b=t5.b) as t4  where t1.a = t4.y;

mysql-test/t/derived.test

@@ -4,6 +4,7 @@ insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');
 CREATE TABLE t2 (a int not null, b char (10) not null);
 insert into t2 values (3,'c'),(4,'d'),(5,'f'),(6,'e');
 select t1.a,t3.y from t1,(select a as y from t2  where b='c') as t3  where t1.a = t3.y;
+select t1.a,t3.a from t1,(select * from t2  where b='c') as t3  where t1.a = t3.a;
 CREATE TABLE t3 (a int not null, b char (10) not null);
 insert into t3 values (3,'f'),(4,'y'),(5,'z'),(6,'c');
 select t1.a,t4.y from t1,(select t2.a as y from t2,(select t3.b from t3 where t3.a>3) as t5  where t2.b=t5.b) as t4  where t1.a = t4.y;

mysys/tree.c

@@ -86,6 +86,7 @@ void init_tree(TREE *tree, uint default_alloc_size, uint memory_limit,
   tree->custom_arg = custom_arg;
   tree->null_element.colour=BLACK;
   tree->null_element.left=tree->null_element.right=0;
+  tree->flag= 0;
   if (!free_element && size >= 0 &&
       ((uint) size <= sizeof(void*) || ((uint) size & (sizeof(void*)-1))))
   {
@@ -231,7 +232,11 @@ TREE_ELEMENT *tree_insert(TREE *tree, void *key, uint key_size,
     rb_insert(tree,parent,element);		/* rebalance tree */
   }
   else
+  {
+    if (tree->flag & TREE_NO_DUPS)
+      return(NULL);
     element->count++;
+  }
   DBUG_EXECUTE("check_tree", test_rb_tree(tree->root););
   return element;
 }

sql/sql_derived.cc

@@ -75,11 +75,11 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
     }
     bzero((char*) &tmp_table_param,sizeof(tmp_table_param));
     tmp_table_param.field_count=item_list.elements;
-    if (!(table= create_tmp_table(thd, &tmp_table_param, sl->item_list,
-				  (ORDER*) 0, 0, 1, 0,
-				  (sl->options | thd->options | 
-				   TMP_TABLE_ALL_COLUMNS),
-				  unit)))
+    if (!(table=create_tmp_table(thd, &tmp_table_param, item_list,
+			         (ORDER*) 0, 0, 1, 0,
+			         (sl->options | thd->options |
+				  TMP_TABLE_ALL_COLUMNS),
+                                 unit)))
     {
       res=-1;
       goto exit;