count HAVING clause elements with select list elements, because agregate...

count HAVING clause elements with select list elements, because agregate function can be present in it (BUG#922)
removerd unused loop_id


mysql-test/r/subselect.result:
  test of BUG#922
mysql-test/t/subselect.test:
  test of BUG#922
sql/item.cc:
  removerd unused loop_id
  we need count HAVING clause elements, because agregate function can be present in it
sql/item.h:
  removerd unused loop_id
sql/item_subselect.cc:
  new name of field
sql/sql_derived.cc:
  new name of field
sql/sql_lex.cc:
  new name of field
sql/sql_lex.h:
  new name of field
sql/sql_select.cc:
  new name of field
sql/sql_union.cc:
  new name of field

mysql-test/r/subselect.result

@@ -1225,3 +1225,10 @@ a	(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 an
 2	2
 1	2
 drop table t1,t2,t3;
+create table t1 (s1 int);
+create table t2 (s1 int);
+insert into t1 values (1);
+insert into t2 values (1);
+select * from t1 where exists (select s1 from t2 having max(t2.s1)=t1.s1);
+s1
+drop table t1,t2;

mysql-test/t/subselect.test

@@ -807,6 +807,7 @@ INSERT INTO t1 VALUES("2f6161e879db43c1a5b82c21ddc49089", "Default", "System", "
 INSERT INTO t1 VALUES("c373e9f5ad0791724315444553544200", "AddDocumentTest", "admin", "2003-06-09 10:51:25", "Movie Reviews", "0", "2003-06-09 10:51:25", "admin", "0", "2f6161e879db43c1a5b82c21ddc49089", "03eea05112b845949f3fd03278b5fe43", NULL);
 SELECT 'c373e9f5ad0791a0dab5444553544200' IN(SELECT t1.FOLDERID FROM t1 WHERE t1.PARENTID='2f6161e879db43c1a5b82c21ddc49089' AND t1.FOLDERNAME = 'Level1');
 drop table t1;
+
 #
 # alloc_group_fields() working
 #
@@ -817,4 +818,14 @@ insert into t1 values (0,100),(1,2), (1,3), (2,2), (2,7), (2,-1), (3,10);
 insert into t2 values (0,0), (1,1), (2,1), (3,1), (4,1);
 insert into t3 values (3,3), (2,2), (1,1); 
 select a,(select count(distinct t1.b) as sum from t1,t2 where t1.a=t2.a and t2.b > 0 and t1.a <= t3.b group by t1.a order by sum limit 1) from t3;
-drop table t1,t2,t3;s
+drop table t1,t2,t3;
+
+#
+# aggregate functions in HAVING test
+#
+create table t1 (s1 int);
+create table t2 (s1 int);
+insert into t1 values (1);
+insert into t2 values (1);
+select * from t1 where exists (select s1 from t2 having max(t2.s1)=t1.s1);
+drop table t1,t2;

sql/item.cc

@@ -49,15 +49,19 @@ Item::Item():
   THD *thd= current_thd;
   next= thd->free_list;			// Put in free list
   thd->free_list= this;
-  loop_id= 0;
   /*
     Item constructor can be called during execution other tnen SQL_COM
     command => we should check thd->lex.current_select on zero (thd->lex
     can be uninitialised)
   */
-  if (thd->lex.current_select &&
-      thd->lex.current_select->parsing_place == SELECT_LEX_NODE::SELECT_LIST)
-    thd->lex.current_select->select_items++;
+  if (thd->lex.current_select)
+  {
+    SELECT_LEX_NODE::enum_parsing_place place= 
+      thd->lex.current_select->parsing_place;
+    if (place == SELECT_LEX_NODE::SELECT_LIST ||
+	place == SELECT_LEX_NODE::IN_HAVING)
+      thd->lex.current_select->select_n_having_items++;
+  }
 }
 
 /*
@@ -66,7 +70,6 @@ Item::Item():
   tables
 */
 Item::Item(THD *thd, Item &item):
-  loop_id(0),
   str_value(item.str_value),
   name(item.name),
   max_length(item.max_length),

sql/item.h

@@ -83,7 +83,6 @@ public:
 };
 
 class Item {
-  uint loop_id;                         /* Used to find selfrefering loops */
   Item(const Item &);			/* Prevent use of these */
   void operator=(Item &);
 public:

sql/item_subselect.cc

@@ -508,7 +508,7 @@ void Item_in_subselect::single_value_transformer(THD *thd,
     {
       sl->item_list.push_back(item);
       setup_ref_array(thd, &sl->ref_pointer_array,
-		      1 + sl->select_items +
+		      1 + sl->select_n_having_items +
 		      sl->order_list.elements + sl->group_list.elements);
       // To prevent crash on Item_ref_null_helper destruction in case of error
       sl->ref_pointer_array[0]= 0;

sql/sql_derived.cc

@@ -126,7 +126,8 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit,
     item_list= select_cursor->item_list;
     select_cursor->with_wild= 0;
     if (setup_ref_array(thd, &select_cursor->ref_pointer_array, 
-			(item_list.elements + select_cursor->select_items +
+			(item_list.elements +
+			 select_cursor->select_n_having_items +
 			 select_cursor->order_list.elements + 
 			 select_cursor->group_list.elements)) ||
 	setup_fields(thd, select_cursor->ref_pointer_array, first_table,

sql/sql_lex.cc

@@ -959,7 +959,7 @@ void st_select_lex_node::init_select()
   order_list.next= (byte**) &order_list.first;
   select_limit= HA_POS_ERROR;
   offset_limit= 0;
-  select_items= 0;
+  select_n_having_items= 0;
   with_sum_func= 0;
   parsing_place= SELECT_LEX_NODE::NO_MATTER;
 }

sql/sql_lex.h

@@ -205,8 +205,12 @@ public:
   ha_rows select_limit, offset_limit; /* LIMIT clause parameters */
   // Arrays of pointers to top elements of all_fields list
   Item **ref_pointer_array;
-
-  uint select_items;    /* number of items in select_list */
+  /*
+    number of items in select_list and HAVING clause used to get number
+    bigger then can be number of entries that will be added to all item
+    list during split_sum_func
+  */
+  uint select_n_having_items;
   uint cond_count;      /* number of arguments of and/or/xor in where/having */
   enum_parsing_place parsing_place; /* where we are parsing expression */
   bool with_sum_func;   /* sum function indicator */

sql/sql_select.cc

@@ -294,7 +294,8 @@ JOIN::prepare(Item ***rref_pointer_array,
 						   fields_list,
 						   &all_fields, wild_num))) ||
       setup_ref_array(thd, rref_pointer_array, (fields_list.elements +
-						select_lex->select_items +
+						select_lex->
+						select_n_having_items +
 						og_num)) ||
       setup_fields(thd, (*rref_pointer_array), tables_list, fields_list, 1,
 		   &all_fields, 1) ||

sql/sql_union.cc

@@ -159,7 +159,8 @@ int st_select_lex_unit::prepare(THD *thd, select_result *sel_result,
     item_list= select_cursor->item_list;
     select_cursor->with_wild= 0;
     if (setup_ref_array(thd, &select_cursor->ref_pointer_array, 
-			(item_list.elements + select_cursor->select_items +
+			(item_list.elements +
+			 select_cursor->select_n_having_items +
 			 select_cursor->order_list.elements + 
 			 select_cursor->group_list.elements)) ||
 	setup_fields(thd, select_cursor->ref_pointer_array, first_table,