protection: TRASH in delete

fixed a bug that it discovered


include/my_sys.h:
  move TRASH to my_sys.h from sql_list.h
sql/field.h:
  use TRASH macro
sql/item.h:
  TRASH in delete
sql/item_func.h:
  never delete item's manually!
sql/opt_range.cc:
  TRASH in delete
sql/sql_lex.h:
  TRASH in delete
sql/sql_list.h:
  move TRASH to my_sys.h from sql_list.h
sql/sql_parse.cc:
  don't use properties of deleted objects (even when it's safe)
sql/sql_select.cc:
  TRASH in delete
sql/sql_show.cc:
  TRASH in delete
sql/sql_string.h:
  TRASH in delete

1 files changed, 6 insertions, 2 deletions

diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index d31305c5dd2..fb8e074ebf8 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -6025,9 +6025,13 @@ static void clear_tables(JOIN *join)
 
 class COND_CMP :public ilink {
 public:
-  static void *operator new(size_t size) {return (void*) sql_alloc((uint) size); }
+  static void *operator new(size_t size)
+  {
+    return (void*) sql_alloc((uint) size);
+  }
   static void operator delete(void *ptr __attribute__((unused)),
-			      size_t size __attribute__((unused))) {} /*lint -e715 */
+                              size_t size __attribute__((unused)))
+  { TRASH(ptr, size); }
 
   Item *and_level;
   Item_func *cmp_func;