From: Date: March 30 2005 12:53pm
Subject: bk commit into 4.1 tree (sergefp:1.2150) BUG#9213
List-Archive: http://lists.mysql.com/internals/23470
X-Bug: 9213
Message-Id: <20050330105353.C26B42BFDA4@newbox.mylan>

Below is the list of changes that have just been committed into a local
4.1 repository of psergey. When psergey does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
For information on how to access the public repository
see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet
  1.2150 05/03/30 14:53:49 sergefp@stripped +1 -0
  BUG#9213 - added more comments to fix

  sql/sql_select.cc
    1.392 05/03/30 14:53:47 sergefp@stripped +4 -2
    BUG#9213 - added more comments to fix

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	sergefp
# Host:	newbox.mylan
# Root:	/home/psergey/mysql-4.1-bug9213

--- 1.391/sql/sql_select.cc	2005-03-30 14:35:35 +04:00
+++ 1.392/sql/sql_select.cc	2005-03-30 14:53:47 +04:00
@@ -7185,8 +7185,10 @@
 	{
           /*
             We'll use ref access method on key new_ref_key. In general case 
-            index search tuple for new_ref_key will be different, so we build
-            it from scratch here.
+            the index search tuple for new_ref_key will be different (e.g.
+            when one of the indexes only covers prefix of the field, see
+            BUG#9213 in group_by.test).
+            So we build tab->ref from scratch here.
           */
           KEYUSE *keyuse= tab->keyuse;
           while (keyuse->key != new_ref_key && keyuse->table == tab->table)