From 6d7862aeafa2376910c28dc27fc998b9675b5d16 Mon Sep 17 00:00:00 2001
From: "igor@linux.local" <>
Date: Fri, 4 Mar 2005 20:24:13 -0800
Subject: logging_ok:   Logging to logging@openlogging.org accepted
 func_group.result, func_group.test:   Added a test case for bug #8893.
 opt_sum.cc:   A misplaced initialization for the returned parameter  
 prefix_len in the function find_key_for_maxmin caused   usage of a wrong key
 prefix by the min/max optimization   in cases when the matching index was not
 the first index   that contained the min/max field.

---
 sql/opt_sum.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sql/opt_sum.cc')

diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc
index 613b2a4aec1..4ab506cc4e1 100644
--- a/sql/opt_sum.cc
+++ b/sql/opt_sum.cc
@@ -624,7 +624,6 @@ static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref,
 {
   if (!(field->flags & PART_KEY_FLAG))
     return 0;                                        // Not key field
-  *prefix_len= 0;
 
   TABLE *table= field->table;
   uint idx= 0;
@@ -637,6 +636,7 @@ static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref,
     KEY_PART_INFO *part,*part_end;
     key_part_map key_part_to_use= 0;
     uint jdx= 0;
+    *prefix_len= 0;
     for (part= keyinfo->key_part, part_end= part+keyinfo->key_parts ;
          part != part_end ;
          part++, jdx++, key_part_to_use= (key_part_to_use << 1) | 1)
-- 
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