Updated/added copyright headers

include/myisam.h

@@ -1,5 +1,5 @@
 /*
-   Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+   Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,8 +32,30 @@ extern "C" {
 #ifndef _keycache_h
 #include "keycache.h"
 #endif
-#include "my_handler.h"
 #include <mysql/plugin.h>
+#include "my_compare.h"
+
+/*
+  There is a hard limit for the maximum number of keys as there are only
+  8 bits in the index file header for the number of keys in a table.
+  This means that 0..255 keys can exist for a table. The idea of
+  HA_MAX_POSSIBLE_KEY is to ensure that one can use myisamchk & tools on
+  a MyISAM table for which one has more keys than MyISAM is normally
+  compiled for. If you don't have this, you will get a core dump when
+  running myisamchk compiled for 128 keys on a table with 255 keys.
+*/
+
+#define HA_MAX_POSSIBLE_KEY         255         /* For myisamchk */
+/*
+  The following defines can be increased if necessary.
+  But beware the dependency of MI_MAX_POSSIBLE_KEY_BUFF and HA_MAX_KEY_LENGTH.
+*/
+
+#define HA_MAX_KEY_LENGTH           1000        /* Max length in bytes */
+#define HA_MAX_KEY_SEG              16          /* Max segments for key */
+
+#define HA_MAX_POSSIBLE_KEY_BUFF    (HA_MAX_KEY_LENGTH + 24+ 6+6)
+#define HA_MAX_KEY_BUFF  (HA_MAX_KEY_LENGTH+HA_MAX_KEY_SEG*6+8+8)
 
 /*
   Limit max keys according to HA_MAX_POSSIBLE_KEY