bk commit into 4.1 tree (heikki:1.1681)

[Heikki Tuuri]

Below is the list of changes that have just been committed into a local
4.1 repository of heikki. When heikki does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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ChangeSet
  1.1681 04/01/29 15:08:22 heikki@stripped +1 -0
  ibuf0ibuf.c:
    Correct the comment about the ibuf record format in >= 4.1.1

  innobase/ibuf/ibuf0ibuf.c
    1.21 04/01/29 15:07:44 heikki@stripped +6 -3
    Correct the comment about the ibuf record format in >= 4.1.1

# 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:	heikki
# Host:	hundin.mysql.fi
# Root:	/home/heikki/mysql-4.1

--- 1.20/innobase/ibuf/ibuf0ibuf.c	Sat Dec 20 03:41:00 2003
+++ 1.21/innobase/ibuf/ibuf0ibuf.c	Thu Jan 29 15:07:44 2004
@@ -48,9 +48,12 @@
 1. The first field is the space id.
 2. The second field is a one-byte marker which differentiates records from
    the < 4.1.x storage format.
-3. The third field contains the type info, where we have also added 2 bytes to
-   store the charset.
-4. The rest of the fields contain the fields of the actual index record.
+3. The third field is the page number.
+4. The fourth field contains the type info, where we have also added 2 bytes to
+   store the charset. In the compressed table format of 5.0.x we must add more
+   information here so that we can build a dummy 'index' struct which 5.0.x
+   can use in the binary search on the index page in the ibuf merge phase.
+5. The rest of the fields contain the fields of the actual index record.
 
 */