From: Date: August 25 2008 7:18pm
Subject: bzr commit into mysql-5.1 branch (sergefp:2726) Bug#36639
List-Archive: http://lists.mysql.com/commits/52595
X-Bug: 36639
Message-Id: <20080825171847.BD4F815A0CF@pslp2.localdomain>
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#At file:///home/spetrunia/dev/mysql-5.1-bugteam-bug36639/

 2726 Sergey Petrunia	2008-08-25 [merge]
      Merge BUG#36639 into 5.1 
modified:
  sql/opt_range.cc
  sql/opt_range.h

=== modified file 'sql/opt_range.cc'
--- a/sql/opt_range.cc	2008-07-25 15:12:47 +0000
+++ b/sql/opt_range.cc	2008-08-25 17:18:22 +0000
@@ -8564,6 +8564,13 @@ QUICK_SELECT_DESC::QUICK_SELECT_DESC(QUI
   used_key_parts (used_key_parts_arg)
 {
   QUICK_RANGE *r;
+  /* 
+    Use default MRR implementation for reverse scans. No table engine
+    currently can do an MRR scan with output in reverse index order.
+  */
+  multi_range_length= 0;
+  multi_range= NULL;
+  multi_range_buff= NULL;
 
   QUICK_RANGE **pr= (QUICK_RANGE**)ranges.buffer;
   QUICK_RANGE **end_range= pr + ranges.elements;

=== modified file 'sql/opt_range.h'
--- a/sql/opt_range.h	2008-07-25 15:12:47 +0000
+++ b/sql/opt_range.h	2008-08-25 17:18:22 +0000
@@ -345,14 +345,7 @@ public:
   void dbug_dump(int indent, bool verbose);
 #endif
 private:
-  /* Used only by QUICK_SELECT_DESC */
-  QUICK_RANGE_SELECT(const QUICK_RANGE_SELECT& org) : QUICK_SELECT_I()
-  {
-    bcopy(&org, this, sizeof(*this));
-    multi_range_length= 0;
-    multi_range= NULL;
-    multi_range_buff= NULL;
-  }
+  /* Default copy ctor used by QUICK_SELECT_DESC */
 };