Merge Konstantin's patch and add a test case.

tests/mysql_client_test.c:
  Add test case for Bug#44495

failed"

Do not assume that SQL prepared statements always run in text protocol.
When invoked from a stored procedure, which is itself invoked
by means of prepared CALL statement, the protocol may be binary.
Juggle with the protocol only when we want to change it
to binary in COM_STMT_EXECUTE, COM_STMT_PREPARE.

This is a backport from 5.4/6.0, where the bug was fixed
as part of WL#4264 "Backup: Stabilize Service Interface" 

          match against.


Server crashes when executing prepared statement with duplicating
MATCH() function calls in SELECT and ORDER BY expressions, e.g.:
SELECT MATCH(a) AGAINST('test') FROM t1 ORDER BY MATCH(a) AGAINST('test')

This query gets optimized by the server, so the value returned
by MATCH() from the SELECT list is reused for ORDER BY purposes.
To make this optimization server is comparing items from
SELECT and ORDER BY lists. We were getting server crash because
comparision function for MATCH() item is not intended to be called
at this point of execution.

In 5.0 and 5.1 this problem is workarounded by resetting MATCH()
item to the state as it was during PREPARE.

In 6.0 correct comparision function will be implemented and
duplicating MATCH() items from the ORDER BY list will be
optimized.

mysql-test/r/fulltext.result:
  Updated with the test case for Bug#37740
mysql-test/t/fulltext.test:
  A test case for Bug#37740.
sql/item_func.h:
  True initialization of 'table' happens in ::fix_fields(). As
  Item_func_match::eq() may be called before ::fix_fields(), it is
  expected that 'table' is initialized to 0 when it is reused.
  
  This is mostly affecting prepared statements, when the same item
  doesn't get destroyed, but rather cleaned up and reused.

"create as select" (innodb table)

Problem: code constructing "CREATE TABLE..." statement
doesn't take into account that current database is not set
in some cases. That may lead to a server crash.

Fix: check if current database is set.


mysql-test/extra/binlog_tests/binlog.test:
  Fix for bug#45998: database crashes when running
  "create as select" (innodb table)
    - test case.
mysql-test/suite/binlog/r/binlog_row_binlog.result:
  Fix for bug#45998: database crashes when running
  "create as select" (innodb table)
    - test result.
sql/sql_show.cc:
  Fix for bug#45998: database crashes when running
  "create as select" (innodb table)
    - added check if there's current database set.

without error

When using quick access methods for searching rows in UPDATE or 
DELETE there was no check if a fatal error was not already sent 
to the client while evaluating the quick condition.
As a result a false OK (following the error) was sent to the 
client and the error was thus transformed into a warning.

Fixed by checking for errors sent to the client during 
SQL_SELECT::check_quick() and treating them as real errors.

Fixed a wrong test case in group_min_max.test
Fixed a wrong return code in mysql_update() and mysql_delete()

mysql-test/r/bug40113.result:
  Bug #40013: test case
mysql-test/r/group_min_max.result:
  Bug #40013: fixed a wrong test case
mysql-test/t/bug40113-master.opt:
  Bug #40013: test case
mysql-test/t/bug40113.test:
  Bug #40013: test case
mysql-test/t/group_min_max.test:
  Bug #40013: fixed a wrong test case
sql/sql_delete.cc:
  Bug #40113: check for errors evaluating the quick select
sql/sql_update.cc:
  Bug #40113: check for errors evaluating the quick select

            mutually-nested subqueries

Queries of the form

  SELECT * FROM (SELECT 1) AS t1,
                (SELECT 2) AS t2,...
                (SELECT 32) AS t32

caused the "Too high level of nesting for select" error
as if the query has a form

  SELECT * FROM (SELECT 1 FROM (SELECT 2 FROM (SELECT 3 FROM...


The table_factor parser rule has been modified to adjust
the LEX::nest_level variable value after every derived table.


mysql-test/r/derived.result:
  Added test case for bug #41156.
mysql-test/t/derived.test:
  Added test case for bug #41156.
sql/sql_yacc.yy:
  Bug #41156: List of derived tables acts like a chain of
              mutually-nested subqueries
  
  The select_derived2 parser rule calls mysql_new_select()
  calls push_context() and nest_level++, however only
  the pop_context() was called at the end of derived table
  parsing at the table_factor rule.
  
  The table_factor parser rule has been modified to adjust
  the LEX::nest_level variable value after every derived table.

Remove commented-out test case. It has been moved to innodb_bug21704.test

  sort_buffer_size cannot allocate

The NULL return from tree_insert() (on low memory) was not
checked for in Item_func_group_concat::add(). As a result
on low memory conditions a crash happens.

Fixed by properly checking the return code.

1. BUG#21704 - Renaming column does not update FK definition

2. Changes in mysql-test/include/mtr_warnings.sql so that the testcase
   for BUG#21704 doesn't fail because of the warnings generated.

Detailed revision comments:

r5488 | vasil | 2009-07-09 19:16:44 +0300 (Thu, 09 Jul 2009) | 13 lines
branches/5.1:

Fix Bug#21704 Renaming column does not update FK definition

by checking whether a column that participates in a FK definition is being
renamed and denying the ALTER in this case.

The patch was originally developed by Davi Arnaut <Davi.Arnaut@Sun.COM>:
http://lists.mysql.com/commits/77714
and was later adjusted to conform to InnoDB coding style by me (Vasil),
I also added some more comments and moved the bug specific mysql-test to
a separate file to make it more manageable and flexible.

            and base tables 

myrg_attach_children() could reuse a buffer that was allocated 
previously based on a definition of a child table. The problem 
was that the child's definition might have been changed, so 
reusing the buffer could lead to crashes or valgrind errors 
under some circumstances. 
 
Fixed by changing myrg_attach_children() so that the 
rec_per_key_part buffer is reused only when the child table
have not changed, and reallocated otherwise (the old buffer is 
deallocated if necessary).


include/myisammrg.h:
  Added a pointer to need_compat_check as an argument to
  myrg_attach_children().
mysql-test/r/merge.result:
  Added a test case for bug #45796.
mysql-test/t/merge.test:
  Added a test case for bug #45796.
storage/myisammrg/ha_myisammrg.cc:
  Pass a pointer to need_compat_check to myrg_attach_children().
storage/myisammrg/myrg_open.c:
  Changed myrg_attach_children() so that the 
  rec_per_key_part buffer is reused only when the child table
  have not changed, and reallocated otherwise (the old buffer 
  is deallocated if necessary).

Detailed revision comments:

r5440 | vasil | 2009-06-30 13:04:29 +0300 (Tue, 30 Jun 2009) | 8 lines
branches/5.1:

Fix Bug#45814 URL reference in InnoDB server errors needs adjusting to match documentation

by changing the URL from
http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting.html to
http://dev.mysql.com/doc/refman/5.1/en/innodb-troubleshooting-datadict.html

BUG#45749 - Race condition in SET GLOBAL innodb_commit_concurrency=DEFAULT

Detailed revision comments:

r5419 | marko | 2009-06-25 16:11:57 +0300 (Thu, 25 Jun 2009) | 18 lines
branches/5.1: Merge r5418 from branches/zip:

  ------------------------------------------------------------------------
  r5418 | marko | 2009-06-25 15:55:52 +0300 (Thu, 25 Jun 2009) | 5 lines
  Changed paths:
     M /branches/zip/ChangeLog
     M /branches/zip/handler/ha_innodb.cc
     M /branches/zip/mysql-test/innodb_bug42101-nonzero.result
     M /branches/zip/mysql-test/innodb_bug42101-nonzero.test
     M /branches/zip/mysql-test/innodb_bug42101.result
     M /branches/zip/mysql-test/innodb_bug42101.test
  
  branches/zip: Fix a race condition caused by
  SET GLOBAL innodb_commit_concurrency=DEFAULT. (Bug #45749)
  When innodb_commit_concurrency is initially set nonzero,
  DEFAULT would change it back to 0, triggering Bug #42101.
  rb://139 approved by Heikki Tuuri.
  ------------------------------------------------------------------------

1. Fixes build warnings caused by applying snapshot 5.1-ss5282

2. Fix the Makefile.am in storage/innobase to remove the header file
   'fsp0types.h' which was added twice to fix build warning generated 
   after applying the 5.1-ss5282 snapshot

Detailed revision comments:

r5410 | marko | 2009-06-24 22:26:34 +0300 (Wed, 24 Jun 2009) | 2 lines
branches/5.1: Add missing #include "mtr0log.h" to avoid warnings
when compiling with -DUNIV_MUST_NOT_INLINE.

unnecessarily
      
The problem is that libmysqlclient.so is built with THREAD
undefined, while a client compiling against the same header
files will see THREAD as defined and definitions in
my_pthread.h will be included, possibly resulting in undefined
symbols that cannot be resolved with libmysqlclient.so.
      
The suggested solution is to require that clients wanting to
link with libmysqlclient.so should be built with
MYSQL_CLIENT_NO_THREADS defined. This requires a documentation
change, and more details for this will be supplied if this
patch is approved.
      
The MYSQL_CLIENT_NO_THREADS define was renamed from
UNDEF_THREADS_HACK, to get a more suitable (less suspicious)
name for the define. (The UNDEF_THREADS_HACK is retained for
backwards compatibility, though.)
      
This patch is also in anticipation of WL#4958, which will
remove this problem altogether by dropping the building of
libmysqlclient.