Merge 4.1 into 5.0.

BitKeeper/etc/logging_ok:
  auto-union
configure.in:
  Auto merged
BitKeeper/deleted/.del-opt_ft.cc~2048ffa561f9c59:
  Auto merged
BitKeeper/deleted/.del-opt_ft.h~24aac1d29304599a:
  Auto merged
client/mysql.cc:
  Auto merged
include/my_global.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
libmysqld/Makefile.am:
  Auto merged
libmysqld/lib_sql.cc:
  Auto merged
myisam/mi_check.c:
  Auto merged
mysql-test/install_test_db.sh:
  Auto merged
mysql-test/r/multi_update.result:
  Auto merged
mysql-test/r/mysqldump.result:
  Auto merged
mysql-test/r/null.result:
  Auto merged
mysql-test/r/show_check.result:
  Auto merged
mysql-test/r/subselect.result:
  Auto merged
mysql-test/r/symlink.result:
  Auto merged
mysql-test/t/multi_update.test:
  Auto merged
mysql-test/t/null.test:
  Auto merged
mysql-test/t/rpl_until.test:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
sql/Makefile.am:
  Auto merged
sql/filesort.cc:
  Auto merged
sql/item.cc:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_create.cc:
  Auto merged
sql/item_create.h:
  Auto merged
sql/item_func.h:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/item_sum.cc:
  Auto merged
sql/item_sum.h:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/protocol.cc:
  Auto merged
sql/repl_failsafe.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/slave.cc:
  Auto merged
sql/slave.h:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_cache.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_db.cc:
  Auto merged
sql/sql_delete.cc:
  Auto merged
sql/sql_derived.cc:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_list.h:
  Auto merged
sql/sql_load.cc:
  Auto merged
sql/sql_prepare.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_union.cc:
  Auto merged
sql/sql_update.cc:
  Auto merged
sql-common/client.c:
  Auto merged

1 files changed, 4 insertions, 2 deletions

diff --git a/sql/sql_select.h b/sql/sql_select.h
index 9bba4e9318e..e1fc5d1c1fe 100644
--- a/sql/sql_select.h
+++ b/sql/sql_select.h
@@ -46,6 +46,8 @@ typedef struct st_table_ref
   store_key     **key_copy;               //
   Item          **items;                  // val()'s for each keypart
   table_map	depend_map;		  // Table depends on these tables.
+  byte          *null_ref_key;		  // null byte position in the key_buf.
+  					  // used for REF_OR_NULL optimization.
 } TABLE_REF;
 
 /*
@@ -88,7 +90,6 @@ typedef struct st_join_table {
   QUICK_SELECT_I *quick;
   Item		*on_expr;
   const char	*info;
-  byte		*null_ref_key;
   int		(*read_first_record)(struct st_join_table *tab);
   int		(*next_select)(JOIN *,struct st_join_table *,bool);
   READ_RECORD	read_record;
@@ -107,6 +108,8 @@ typedef struct st_join_table {
   TABLE_REF	ref;
   JOIN_CACHE	cache;
   JOIN		*join;
+
+  void cleanup();
 } JOIN_TAB;
 
 
@@ -431,7 +434,6 @@ public:
 
 bool cp_buffer_from_ref(TABLE_REF *ref);
 bool error_if_full_join(JOIN *join);
-void relink_tables(SELECT_LEX *select_lex);
 int report_error(TABLE *table, int error);
 int safe_index_read(JOIN_TAB *tab);
 COND *eliminate_not_funcs(COND *cond);