Changed mysql_next_result() to return int instead of bool

Changed ~Item_func_in() to call cleanup() (to fix memory leak)
Fixed test_multi_statements() test in client_test


include/mysql.h:
  Changed mysql_next_result() to return int instead of bool
libmysql/libmysql.c:
  Changed mysql_next_result() to return int instead of bool
  Added check to mysql_next_result() to ensure that it's not called in wrong context.
sql/item_cmpfunc.cc:
  Indentation fixes
sql/item_cmpfunc.h:
  Changed ~Item_func_in() to call cleanup()
  (Fixed memory leak in cmp_item_row())
tests/client_test.c:
  Fixed test_multi_statements() test.

include/mysql.h

@@ -604,7 +604,7 @@ MYSQL_RES *STDCALL mysql_param_result(MYSQL_STMT *stmt);
 my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt);
 int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt);
 my_bool STDCALL mysql_more_results(MYSQL *mysql);
-my_bool STDCALL mysql_next_result(MYSQL *mysql);
+int STDCALL mysql_next_result(MYSQL *mysql);
 MYSQL_ROW_OFFSET STDCALL mysql_stmt_row_seek(MYSQL_STMT *stmt, 
                                              MYSQL_ROW_OFFSET offset);
 MYSQL_ROW_OFFSET STDCALL mysql_stmt_row_tell(MYSQL_STMT *stmt);

libmysql/libmysql.c

@@ -3317,7 +3317,7 @@ my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt)
 my_bool STDCALL mysql_stmt_free_result(MYSQL_STMT *stmt)
 { 
   MYSQL *mysql;
-  DBUG_ENTER("mysql_stmt_close");
+  DBUG_ENTER("mysql_stmt_free_result");
 
   DBUG_ASSERT(stmt != 0);
   
@@ -3498,10 +3498,18 @@ my_bool STDCALL mysql_more_results(MYSQL *mysql)
   Reads and returns the next query results
 */
 
-my_bool STDCALL mysql_next_result(MYSQL *mysql)
+int STDCALL mysql_next_result(MYSQL *mysql)
 {
   DBUG_ENTER("mysql_next_result");
   
+  if (mysql->status != MYSQL_STATUS_READY)
+  {
+    strmov(mysql->net.sqlstate, unknown_sqlstate);
+    strmov(mysql->net.last_error,
+	   ER(mysql->net.last_errno=CR_COMMANDS_OUT_OF_SYNC));
+    DBUG_RETURN(1);
+  }
+
   mysql->net.last_error[0]= 0;
   mysql->net.last_errno= 0;
   strmov(mysql->net.sqlstate, not_error_sqlstate);
@@ -3510,9 +3518,10 @@ my_bool STDCALL mysql_next_result(MYSQL *mysql)
   if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
     DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
   
-  DBUG_RETURN(0);
+  DBUG_RETURN(-1);				/* No more results */
 }
 
+
 MYSQL_RES * STDCALL mysql_use_result(MYSQL *mysql)
 {
   return (*mysql->methods->use_result)(mysql);

sql/item_cmpfunc.cc

@@ -1375,6 +1375,7 @@ cmp_item* cmp_item::get_comparator(Item *item)
   return 0; // to satisfy compiler :)
 }
 
+
 cmp_item* cmp_item_sort_string::make_same()
 {
   return new cmp_item_sort_string_in_static(cmp_charset);
@@ -1395,6 +1396,23 @@ cmp_item* cmp_item_row::make_same()
   return new cmp_item_row();
 }
 
+
+cmp_item_row::~cmp_item_row()
+{
+  DBUG_ENTER("~cmp_item_row");
+  DBUG_PRINT("enter",("this: %lx", this));
+  if (comparators)
+  {
+    for (uint i= 0; i < n; i++)
+    {
+      if (comparators[i])
+	delete comparators[i];
+    }
+  }
+  DBUG_VOID_RETURN;
+}
+
+
 void cmp_item_row::store_value(Item *item)
 {
   THD *thd= current_thd;
@@ -1404,18 +1422,16 @@ void cmp_item_row::store_value(Item *item)
     item->bring_value();
     item->null_value= 0;
     for (uint i=0; i < n; i++)
-      if ((comparators[i]= cmp_item::get_comparator(item->el(i))))
-      {
-	comparators[i]->store_value(item->el(i));
-	item->null_value|= item->el(i)->null_value;
-      }
-      else
-	return;
+    {
+      if (!(comparators[i]= cmp_item::get_comparator(item->el(i))))
+	break;					// new failed
+      comparators[i]->store_value(item->el(i));
+      item->null_value|= item->el(i)->null_value;
+    }
   }
-  else
-    return;
 }
 
+
 void cmp_item_row::store_value_by_template(cmp_item *t, Item *item)
 {
   cmp_item_row *tmpl= (cmp_item_row*) t;
@@ -1430,19 +1446,17 @@ void cmp_item_row::store_value_by_template(cmp_item *t, Item *item)
     item->bring_value();
     item->null_value= 0;
     for (uint i=0; i < n; i++)
-      if ((comparators[i]= tmpl->comparators[i]->make_same()))
-      {
-	comparators[i]->store_value_by_template(tmpl->comparators[i],
-						item->el(i));
-	item->null_value|= item->el(i)->null_value;
-      }
-      else
-	return;
+    {
+      if (!(comparators[i]= tmpl->comparators[i]->make_same()))
+	break;					// new failed
+      comparators[i]->store_value_by_template(tmpl->comparators[i],
+					      item->el(i));
+      item->null_value|= item->el(i)->null_value;
+    }
   }
-  else
-    return;
 }
 
+
 int cmp_item_row::cmp(Item *arg)
 {
   arg->null_value= 0;
@@ -1454,25 +1468,31 @@ int cmp_item_row::cmp(Item *arg)
   bool was_null= 0;
   arg->bring_value();
   for (uint i=0; i < n; i++)
+  {
     if (comparators[i]->cmp(arg->el(i)))
     {
       if (!arg->el(i)->null_value)
 	return 1;
       was_null= 1;
     }
+  }
   return (arg->null_value= was_null);
 }
 
+
 int cmp_item_row::compare(cmp_item *c)
 {
-  int res;
   cmp_item_row *cmp= (cmp_item_row *) c;
   for (uint i=0; i < n; i++)
+  {
+    int res;
     if ((res= comparators[i]->compare(cmp->comparators[i])))
       return res;
+  }
   return 0;
 }
 
+
 bool Item_func_in::nulls_in_row()
 {
   Item **arg,**arg_end;
@@ -1484,6 +1504,7 @@ bool Item_func_in::nulls_in_row()
   return 0;
 }
 
+
 static int srtcmp_in(CHARSET_INFO *cs, const String *x,const String *y)
 {
   return cs->coll->strnncollsp(cs,
@@ -1491,6 +1512,7 @@ static int srtcmp_in(CHARSET_INFO *cs, const String *x,const String *y)
 			(unsigned char *) y->ptr(),y->length());
 }
 
+
 void Item_func_in::fix_length_and_dec()
 {
   Item **arg, **arg_end;

sql/item_cmpfunc.h

@@ -638,17 +638,7 @@ class cmp_item_row :public cmp_item
   uint n;
 public:
   cmp_item_row(): comparators(0), n(0) {}
-  ~cmp_item_row()
-  {
-    if (comparators)
-    {
-      for (uint i= 0; i < n; i++)
-      {
-	if (comparators[i])
-	  delete comparators[i];
-      }
-    }
-  }
+  ~cmp_item_row();
   void store_value(Item *item);
   int cmp(Item *arg);
   int compare(cmp_item *arg);
@@ -694,7 +684,7 @@ class cmp_item_sort_string_in_static :public cmp_item_string
     cmp_item_string *cmp= (cmp_item_string *)c;
     return sortcmp(value_res, cmp->value_res, cmp_charset);
   }
-  cmp_item * make_same()
+  cmp_item *make_same()
   {
     return new cmp_item_sort_string_in_static(cmp_charset);
   }
@@ -715,7 +705,10 @@ class Item_func_in :public Item_int_func
   }
   longlong val_int();
   void fix_length_and_dec();
-  ~Item_func_in() {}
+  ~Item_func_in()
+  {
+    cleanup(); /* This is not called by Item::~Item() */
+  }
   void cleanup()
   {
     delete array;