Add support for NULL=NULL in keys (Used in GROUP BY optimization)

Add ISAM to Windows version
Fix of test results
Fixes for NULL keys in HEAP tables.


Docs/manual.texi:
  Changelog
heap/hp_open.c:
  Add support for NULL=NULL in keys (for GROUP BY)
heap/hp_rkey.c:
  Cleanup
heap/hp_write.c:
  Cleanup
include/config-win.h:
  Add ISAM to Windows version
include/my_base.h:
  Add support for NULL=NULL in keys (for GROUP BY)
libmysqld/Makefile.am:
  Rename of innobase to innodb
myisam/mi_write.c:
  Add support for NULL=NULL in keys (for GROUP BY)
BitKeeper/etc/ignore:
  Added libmysqld/ha_innodb.cc to the ignore list
mysql-test/r/group_by.result:
  Test of NULL keys in HEAP tables
mysql-test/r/heap.result:
  Test of NULL keys in HEAP tables
mysql-test/r/null.result:
  Cleanup
mysql-test/r/order_by.result:
  Fix for result of new ORDER BY optimization
mysql-test/t/group_by.test:
  Test of NULL keys in HEAP tables
mysql-test/t/heap.test:
  Test of NULL keys in HEAP tables
mysql-test/t/null.test:
  Cleanup
sql/ha_heap.cc:
  Add support of NULL keys
sql/item_strfunc.h:
  Fix for BINARY and CAST functions
sql/item_timefunc.h:
  Fix for BINARY and CAST functions
sql/sql_parse.cc:
  Cleanup
sql/sql_select.cc:
  Add support for NULL=NULL in keys (for GROUP BY)

1 files changed, 2 insertions, 1 deletions

diff --git a/sql/item_timefunc.h b/sql/item_timefunc.h
index c9daa2316e8..32b85e7f028 100644
--- a/sql/item_timefunc.h
+++ b/sql/item_timefunc.h
@@ -418,7 +418,8 @@ class Item_typecast :public Item_str_func
 {
 public:
   Item_typecast(Item *a) :Item_str_func(a) {}
-  String *val_str(String *a) { return (args[0]->val_str(a)); }
+  String *val_str(String *a)
+  { a=args[0]->val_str(a); null_value=args[0]->null_value; return a; }
   void fix_length_and_dec() { max_length=args[0]->max_length; }
   void print(String *str);
 };