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                              WORKLOG TASK
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TASK...........: mysqlbinlog: remove undesired effects of format description binlog
		statement 
CREATION DATE..: Mon, 17 Aug 2009, 14:12
SUPERVISOR.....: Monty
IMPLEMENTOR....: 
COPIES TO......: 
CATEGORY.......: Server-RawIdeaBin
TASK ID........: 50 (http://askmonty.org/worklog/?tid=50)
VERSION........: Server-9.x
STATUS.........: Un-Assigned
PRIORITY.......: 60
WORKED HOURS...: 2
ESTIMATE.......: 0 (hours remain)
ORIG. ESTIMATE.: 0

PROGRESS NOTES:

-=-=(Knielsen - Mon, 07 Sep 2009, 10:06)=-=-
Research worklog, bugs, and existing server code.

Worked 2 hours and estimate 0 hours remain (original estimate increased by 2 hours).

-=-=(Psergey - Mon, 17 Aug 2009, 14:13)=-=-
Dependency created: 39 now depends on 50

-=-=(Psergey - Mon, 17 Aug 2009, 14:13)=-=-
High-Level Specification modified.
--- /tmp/wklog.50.old.11389     2009-08-17 14:13:05.000000000 +0300
+++ /tmp/wklog.50.new.11389     2009-08-17 14:13:05.000000000 +0300
@@ -1 +1,14 @@
+First item
+----------
+AFAIU what needs to be done is:
+1. record a source server version (it is in the first binlog event). 
+2. don't emit a BINLOG statement if the recorded version number is 5.0.x or
+  below.
+
+and we'll get a 5.0-applicable binlog.
+
+Second item
+-----------
+One question that one needs to sort out before disabling server_id change is 
+why it was put there in the first place?  Should it be always removed?
 



DESCRIPTION:

According to complaints in BUG#46640:

1. mysqlbinlog will emit a 5.0-incompatible "format description binlog 
statement" even when reading a binary log that was produced by 5.0. 
This will cause an error when one tires to apply mysqlbinlog output to a
5.0.x server.

2. When one applies "format description binlog statement" at the slave, it 
will change the slave's server_id when applied. 

This WL is to fix these issues.


HIGH-LEVEL SPECIFICATION:



First item
----------
AFAIU what needs to be done is:
1. record a source server version (it is in the first binlog event). 
2. don't emit a BINLOG statement if the recorded version number is 5.0.x or
  below.

and we'll get a 5.0-applicable binlog.

Second item
-----------
One question that one needs to sort out before disabling server_id change is 
why it was put there in the first place?  Should it be always removed?


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