From dcf5ba1c95e8012c9e4dcead01286973cc925cf8 Mon Sep 17 00:00:00 2001
From: "monty@mysql.com" <>
Date: Tue, 16 Mar 2004 13:51:35 +0200
Subject: [PATCH] Increase max size of number of elements in key. This fixed a
 bug when using count(DISTINCT) with lot of distinct values and big
 'max_heap_table_size'

---
 include/my_tree.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/my_tree.h b/include/my_tree.h
index 7cc7c615ba6..6aec50215ca 100644
--- a/include/my_tree.h
+++ b/include/my_tree.h
@@ -20,7 +20,9 @@
 extern "C" {
 #endif
 
-#define MAX_TREE_HIGHT	40	/* = max 1048576 leafs in tree */
+/* Worst case tree is half full. This gives use 2^(MAX_TREE_HIGHT/2) leafs */
+#define MAX_TREE_HIGHT	64
+
 #define ELEMENT_KEY(tree,element)\
 (tree->offset_to_key ? (void*)((byte*) element+tree->offset_to_key) :\
 			*((void**) (element+1)))