Merge abotchkov@bk-internal.mysql.com:/home/bk/mysql-4.1

into deer.(none):/home/hf/work/mysql-4.1.2way

6 files changed, 25 insertions, 119 deletions

diff --git a/sql/item_func.cc b/sql/item_func.cc
index 7264a3b5225..7e236225067 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -1170,32 +1170,32 @@ longlong Item_func_field::val_int()
   if (cmp_type == STRING_RESULT)
   {
     String *field;
-    if (!(field=item->val_str(&value)))
+    if (!(field=args[0]->val_str(&value)))
       return 0;					// -1 if null ?
-    for (uint i=0 ; i < arg_count ; i++)
+    for (uint i=1 ; i < arg_count ; i++)
     {
       String *tmp_value=args[i]->val_str(&tmp);
       if (tmp_value && field->length() == tmp_value->length() &&
 	  !sortcmp(field,tmp_value,cmp_collation.collation))
-        return (longlong) (i+1);
+        return (longlong) (i);
     }
   }
   else if (cmp_type == INT_RESULT)
   {
-    longlong val= item->val_int();
-    for (uint i=0; i < arg_count ; i++)
+    longlong val= args[0]->val_int();
+    for (uint i=1; i < arg_count ; i++)
     {
       if (val == args[i]->val_int())
- 	return (longlong) (i+1);
+ 	return (longlong) (i);
     }
   }
   else
   {
-    double val= item->val();
-    for (uint i=0; i < arg_count ; i++)
+    double val= args[0]->val();
+    for (uint i=1; i < arg_count ; i++)
     {
       if (val == args[i]->val())
- 	return (longlong) (i+1);
+ 	return (longlong) (i);
     }
   }
   return 0;
@@ -1204,42 +1204,11 @@ longlong Item_func_field::val_int()
 void Item_func_field::fix_length_and_dec()
 {
   maybe_null=0; max_length=3;
-  used_tables_cache|= item->used_tables();
-  const_item_cache&=  item->const_item();
-  with_sum_func= with_sum_func || item->with_sum_func;
-  
-  cmp_type= item->result_type();
-  for (uint i=0; i < arg_count ; i++)
+  cmp_type= args[0]->result_type();
+  for (uint i=1; i < arg_count ; i++)
     cmp_type= item_cmp_type(cmp_type, args[i]->result_type());
-  
   if (cmp_type == STRING_RESULT)
-  {
-    cmp_collation.set(item->collation);
-    for (uint i=0 ; i < arg_count ; i++)
-    {
-      if (cmp_collation.aggregate(args[i]->collation))
-      {
-	my_error(ER_CANT_AGGREGATE_NCOLLATIONS,MYF(0),func_name());
-	return;
-      }
-    }
-  }
-}
-
-
-void Item_func_field::split_sum_func(Item **ref_pointer_array,
-				     List<Item> &fields)
-{
-  if (item->with_sum_func && item->type() != SUM_FUNC_ITEM)
-    item->split_sum_func(ref_pointer_array, fields);
-  else if (item->used_tables() || item->type() == SUM_FUNC_ITEM)
-  {
-    uint el= fields.elements;
-    fields.push_front(item);
-    ref_pointer_array[el]= item;
-    item= new Item_ref(ref_pointer_array + el, 0, item->name);
-  }
-  Item_func::split_sum_func(ref_pointer_array, fields);
+    agg_arg_collations_for_comparison(cmp_collation, args, arg_count);
 }
 
 
diff --git a/sql/item_func.h b/sql/item_func.h
index a5575a35851..a0969fc6b9a 100644
--- a/sql/item_func.h
+++ b/sql/item_func.h
@@ -625,33 +625,14 @@ public:
 
 class Item_func_field :public Item_int_func
 {
-  Item *item;
   String value,tmp;
   Item_result cmp_type;
   DTCollation cmp_collation;
 public:
-  Item_func_field(Item *a,List<Item> &list) :Item_int_func(list),item(a) {}
-  ~Item_func_field() { delete item; }
+  Item_func_field(List<Item> &list) :Item_int_func(list) {}
   longlong val_int();
-  bool fix_fields(THD *thd,struct st_table_list *tlist, Item **ref)
-  {
-    return (item->fix_fields(thd, tlist, &item) || item->check_cols(1) ||
-	    Item_func::fix_fields(thd, tlist, ref));
-  }
-  void split_sum_func(Item **ref_pointer_array, List<Item> &fields);
-  void update_used_tables()
-  {
-    item->update_used_tables() ; Item_func::update_used_tables();
-    used_tables_cache|= item->used_tables();
-    const_item_cache&=  item->const_item();
-  }
   const char *func_name() const { return "field"; }
   void fix_length_and_dec();
-  void set_outer_resolving()
-  {
-    item->set_outer_resolving();
-    Item_int_func::set_outer_resolving();
-  }
 };
 
 
diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index b25619d0bb1..4e35e90b429 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -1660,81 +1660,53 @@ void Item_func_elt::fix_length_and_dec()
   max_length=0;
   decimals=0;
   
-  if (agg_arg_collations(collation, args, arg_count))
+  if (agg_arg_collations(collation, args+1, arg_count-1))
     return;
 
-  for (uint i=0 ; i < arg_count ; i++)
+  for (uint i=1 ; i < arg_count ; i++)
   {
     set_if_bigger(max_length,args[i]->max_length);
     set_if_bigger(decimals,args[i]->decimals);
   }
   maybe_null=1;					// NULL if wrong first arg
-  with_sum_func= with_sum_func || item->with_sum_func;
-  used_tables_cache|=item->used_tables();
-  const_item_cache&=item->const_item();
-}
-
-
-void Item_func_elt::split_sum_func(Item **ref_pointer_array,
-				   List<Item> &fields)
-{
-  if (item->with_sum_func && item->type() != SUM_FUNC_ITEM)
-    item->split_sum_func(ref_pointer_array, fields);
-  else if (item->used_tables() || item->type() == SUM_FUNC_ITEM)
-  {
-    uint el= fields.elements;
-    fields.push_front(item);
-    ref_pointer_array[el]= item;
-    item= new Item_ref(ref_pointer_array + el, 0, item->name);
-  }
-  Item_str_func::split_sum_func(ref_pointer_array, fields);
-}
-
-
-void Item_func_elt::update_used_tables()
-{
-  Item_func::update_used_tables();
-  item->update_used_tables();
-  used_tables_cache|=item->used_tables();
-  const_item_cache&=item->const_item();
 }
 
 
 double Item_func_elt::val()
 {
   uint tmp;
-  if ((tmp=(uint) item->val_int()) == 0 || tmp > arg_count)
+  if ((tmp=(uint) args[0]->val_int()) == 0 || tmp >= arg_count)
   {
     null_value=1;
     return 0.0;
   }
   null_value=0;
-  return args[tmp-1]->val();
+  return args[tmp]->val();
 }
 
 longlong Item_func_elt::val_int()
 {
   uint tmp;
-  if ((tmp=(uint) item->val_int()) == 0 || tmp > arg_count)
+  if ((tmp=(uint) args[0]->val_int()) == 0 || tmp >= arg_count)
   {
     null_value=1;
     return 0;
   }
   null_value=0;
-  return args[tmp-1]->val_int();
+  return args[tmp]->val_int();
 }
 
 String *Item_func_elt::val_str(String *str)
 {
   uint tmp;
   String *res;
-  if ((tmp=(uint) item->val_int()) == 0 || tmp > arg_count)
+  if ((tmp=(uint) args[0]->val_int()) == 0 || tmp >= arg_count)
   {
     null_value=1;
     return NULL;
   }
   null_value=0;
-  res= args[tmp-1]->val_str(str);
+  res= args[tmp]->val_str(str);
   res->set_charset(charset());
   return res;
 }
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index 6cc6d730627..7f8d7ade67b 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -372,29 +372,13 @@ public:
 
 class Item_func_elt :public Item_str_func
 {
-  Item *item;
-
 public:
-  Item_func_elt(Item *a,List<Item> &list) :Item_str_func(list),item(a) {}
-  ~Item_func_elt() { delete item; }
+  Item_func_elt(List<Item> &list) :Item_str_func(list) {}
   double val();
   longlong val_int();
   String *val_str(String *str);
-  bool fix_fields(THD *thd, TABLE_LIST *tlist, Item **ref)
-  {
-    return (item->fix_fields(thd, tlist, &item) ||
-	    item->check_cols(1) ||
-	    Item_func::fix_fields(thd, tlist, ref));
-  }
-  void split_sum_func(Item **ref_pointer_array, List<Item> &fields);
   void fix_length_and_dec();
-  void update_used_tables();
   const char *func_name() const { return "elt"; }
-  void set_outer_resolving()
-  {
-    item->set_outer_resolving();
-    Item_str_func::set_outer_resolving();
-  }
 };
 
 
diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc
index 4fdb1b13d24..c2d1504e94a 100644
--- a/sql/item_timefunc.cc
+++ b/sql/item_timefunc.cc
@@ -380,7 +380,7 @@ longlong Item_func_time_to_sec::val_int()
 static bool get_interval_value(Item *args,interval_type int_type,
 			       String *str_value, INTERVAL *t)
 {
-  long array[4],value;
+  long array[5],value;
   const char *str;
   uint32 length;
   LINT_INIT(value);  LINT_INIT(str); LINT_INIT(length);
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index c836cb414e0..45a647cd8ab 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -2389,7 +2389,7 @@ simple_expr:
 	| DAY_SYM '(' expr ')'
 	  { $$= new Item_func_dayofmonth($3); }
 	| ELT_FUNC '(' expr ',' expr_list ')'
-	  { $$= new Item_func_elt($3, *$5); }
+	  { $5->push_front($3); $$= new Item_func_elt(*$5); }
 	| MAKE_SET_SYM '(' expr ',' expr_list ')'
 	  { $$= new Item_func_make_set($3, *$5); }
 	| ENCRYPT '(' expr ')'
@@ -2427,7 +2427,7 @@ simple_expr:
 	    $$= new Item_func_date_format (new Item_func_from_unixtime($3),$5,0);
 	  }
 	| FIELD_FUNC '(' expr ',' expr_list ')'
-	  { $$= new Item_func_field($3, *$5); }
+	  { $5->push_front($3); $$= new Item_func_field(*$5); }
 	| GEOMFROMTEXT '(' expr ')'
 	  { $$= new Item_func_geometry_from_text($3); }
 	| GEOMFROMTEXT '(' expr ',' expr ')'