New SET syntax & system variables.

Made a some new buffers thread specific and changeable.
Resize of key_buffer.
AUTO_COMMIT -> AUTOCOMMIT
Fixed mutex bug in DROP DATABASE
Fixed bug when using auto_increment as second part of a key where first part could include NULL.
Split handler->extra() to extra() and extra_opt() to be able to support thread specific buffers.
Don't write message to error log when slave reconnects becasue of timeout.
Fixed possible update problem when using DELETE/UPDATE on small tables
(In some cases we used index even if table scanning would be better)
A lot of minior code cleanups

1 files changed, 2 insertions, 1 deletions

diff --git a/sql/item.h b/sql/item.h
index 7612246b4b0..910db2fbddc 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -98,6 +98,7 @@ public:
   const char *full_name() const;
 };
 
+
 class Item_field :public Item_ident
 {
   void set_field(Field *field);
@@ -193,6 +194,7 @@ class Item_uint :public Item_int
 public:
   Item_uint(const char *str_arg, uint length) :
     Item_int(str_arg, (longlong) strtoull(str_arg,(char**) 0,10), length) {}
+  Item_uint(uint32 i) :Item_int((longlong) i, 10) {}
   double val() { return ulonglong2double(value); }
   String *val_str(String*);
   void make_field(Send_field *field);
@@ -478,4 +480,3 @@ extern Item_buff *new_Item_buff(Item *item);
 extern Item_result item_cmp_type(Item_result a,Item_result b);
 extern Item *resolve_const_item(Item *item,Item *cmp_item);
 extern bool field_is_equal_to_item(Field *field,Item *item);
-Item *get_system_var(LEX_STRING name);