This patch fixes some typos and poorly formulated sentences in
the output from mysqld --help --verbose.

Some of the problems described in the bug report are already
handled by the patch for Bug#49447, and are therefore not
included in this patch.

START SLAVE UNTIL MASTER ... specifies only SQL thread to stop.
rpl_slave_skip erronously deployed waiting for stop of both threads.

Corrected with deploying the correct macro.
Notice, earlier a similar bug@47749 was fixed in mysql-trunk.

for same data when using bit fields

Problem: checksum for BIT fields may be computed incorrectly 
in some cases due to its storage peculiarity.

Fix: convert a BIT field to a string then calculate its checksum.

disabling the test to not run on PB

POSIX standard, reinitialization of a pthread_once is a gray
area, but it is needed to support subsequent initializations
of the client library.

A client doing multiple mysql_library_init() and
mysql_library_end() calls over the lifetime of the process may
experience lost character set data, potentially even a
SIGSEGV.

This patch reinstates the reloading of character set data when
a mysql_library_init() is done after a mysql_library_end().

Item_field::print method does not take into
account fields whose values may be null.
The fix is to print 'NULL' if field value is null.

Fixed a syntax error in mysqld_multi.sh

The problem was that the CSV storage engine does not support NULL
fields, yet in some early 5.1 version the log tables (general_log
and slow_log) were created with null fields. On top of this, when
altering a CSV table column, all fields of the table must be NOT
NULL otherwise the alteration fails.

The solution is to ensure that during upgrade all columns of the
log tables are NOT NULL.

The test failed due to Bug #29790.
However, logics of the failing part does not need I_S selecting.

Fixing to remove the non-deterministic I_S selecting as redundant
from a part of the test dealing with BUG@22864.

correcting c&p typos in the results

correcting c&p typos in the test

The problem is that cond->fix_fields(thd, 0) breaks
condition(cuts off 'having'). The reason of that is
that NULL valued Item pointer is present in the
middle of Item list and it breaks the Item processing
loop.

performance degradation.

Filesort + join cache combination is preferred to full index scan because it
is usually faster. But it's not the case when the index is clustered one.

Now test_if_skip_sort_order function prefers filesort only if index isn't
clustered.

Detailed revision comments:

r6669 | jyang | 2010-02-11 12:24:19 +0200 (Thu, 11 Feb 2010) | 7 lines
branches/5.1: Fix bug #50691, AIX implementation of readdir_r
causes InnoDB errors. readdir_r() returns an non-NULL value
in the case of reaching the end of a directory. It should
not be treated as an error return.

rb://238 approved by Marko

Detailed revision comments:

r6613 | inaam | 2010-02-09 20:23:09 +0200 (Tue, 09 Feb 2010) | 11 lines
branches/5.1: Fix Bug #38901
InnoDB logs error repeatedly when trying to load page into buffer pool

In buf_page_get_gen() if we are unable to read a page (because of
corruption or some other reason) we keep on retrying. This fills up
error log with millions of entries in no time and we'd eventually run
out of disk space. This patch limits the number of attempts that we
make (currently set to 100) and after that we abort with a message.

rb://241 Approved by: Heikki

Detailed revision comments:

r6545 | jyang | 2010-02-03 03:57:32 +0200 (Wed, 03 Feb 2010) | 8 lines
branches/5.1: Fix bug #49001, "SHOW INNODB STATUS deadlock info
incorrect when deadlock detection aborts". Print the correct
lock owner when recursive function lock_deadlock_recursive()
exceeds its maximum depth LOCK_MAX_DEPTH_IN_DEADLOCK_CHECK.

rb://217, approved by Marko.