ORDER BY optimization

Fixed new bug when reading field types


client/mysql.cc:
  Fixed output for -T
libmysql/libmysql.c:
  Filled missing fields in new MYSQL_FIELD structure
  Fixed new bug when reading field types
mysql-test/r/order_by.result:
  Result after new order by optimization
sql/opt_range.cc:
  New ORDER BY optimization
sql/opt_range.h:
  New ORDER BY optimization
sql/set_var.cc:
  Speed optimization
sql/sql_select.cc:
  New ORDER BY optimization
  
  This alllows MySQL to change a ref/range index from (a,b) to (a,c) when 'b' was not used to find rows and one did
  ORDER BY a,c or ORDER BY c

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/opt_range.h b/sql/opt_range.h
index bc56fb99b4b..00736bfc22f 100644
--- a/sql/opt_range.h
+++ b/sql/opt_range.h
@@ -70,7 +70,7 @@ class QUICK_SELECT {
 public:
   bool next,dont_free;
   int error;
-  uint index,max_used_key_length;
+  uint index, max_used_key_length, used_key_parts;
   TABLE *head;
   handler *file;
   byte    *record;