In a subselect all fields from outer selects are marked as dependent on
selects they are belong to. In some cases optimizer substitutes it for an
equivalent expression. For example "a_field IN (SELECT outer_field)" is
substituted with "a_field = outer_field". As we moved the outer_field to the
upper select it's not really outer anymore. But it was left marked as outer.
If exists an index over a_field optimizer choose wrong execution plan and thus
return wrong result.

Now the Item_in_subselect::single_value_transformer function removes dependent
marking from fields when a subselect is optimized away.

  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.

       
Fixed various compilation warnings when compiling on a 
 64 bit windows.

Fixed the following problems:
1. cmake 2.6 warning because of a changed default on
how the dependencies to libraries with a specified 
path are resolved.
Fixed by requiring cmake 2.6.
2. Removed an obsolete pre-NT4 hack including defining
Windows system defines to alter the behavior of windows.h.
3. Disabled warning C4065 on compiling sql_yacc.cc because
of a know incompatibility in some of the newer bison binaries.

          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.

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()

GHz.

The crash happend because for views which are joins
we have table_list->table == 0 and 
table_list->table->'any method' call leads to crash.
The fix is to perform table_list->table->file->extra()
method for all tables belonging to view.

Details:
- Add "sync_slave_with_master" at test end
- Restore the initial value of log_bin_trust_function_creators

without proper formatting
      
The problem is that a suitably crafted database identifier
supplied to COM_CREATE_DB or COM_DROP_DB can cause a SIGSEGV,
and thereby a denial of service. The database name is printed
to the log without using a format string, so potential
attackers can control the behavior of my_b_vprintf() by
supplying their own format string. A CREATE or DROP privilege
would be required.
      
This patch supplies a format string to the printing of the
database name. A test case is added to mysql_client_test.

                               But Should Be "Zero Rows"


After applying the innodb snapshot 5.0-ss5406 for bug#40565, the windows push build
tests failed because of the missing cast of void * pointer in row0sel.c file

Informed the innodb developers and received patch by email.

BUG#40565 - Update Query Results in "1 Row Affected" But Should Be "Zero Rows"

Detailed revision comments:

r5232 | marko | 2009-06-03 14:31:04 +0300 (Wed, 03 Jun 2009) | 21 lines
branches/5.0: Merge r3590 from branches/5.1 in order to fix Bug #40565
(Update Query Results in "1 Row Affected" But Should Be "Zero Rows").

Also, add a test case for Bug #40565.

rb://128 approved by Heikki Tuuri
  ------------------------------------------------------------------------
  r3590 | marko | 2008-12-18 15:33:36 +0200 (Thu, 18 Dec 2008) | 11 lines

  branches/5.1: When converting a record to MySQL format, copy the default
  column values for columns that are SQL NULL.  This addresses failures in
  row-based replication (Bug #39648).

  row_prebuilt_t: Add default_rec, for the default values of the columns in
  MySQL format.

  row_sel_store_mysql_rec(): Use prebuilt->default_rec instead of
  padding columns.

  rb://64 approved by Heikki Tuuri
  ------------------------------------------------------------------------

BUG#38479 - valgrind warnings in show table status for innodb tables

Detailed revision comments:

r5080 | vasil | 2009-05-22 14:45:34 +0300 (Fri, 22 May 2009) | 6 lines
branches/5.0:

Fix Bug#38479 valgrind warnings in show table status for innodb tables

by initializing prebuilt->hint_need_to_fetch_extra_cols.

  Details:
  - Limit the queries to character sets and collations
    which are most probably available in all build types.
    But try to preserve the intention of the tests.
  - Remove the variants adjusted to some build types.

  Note:
  1. The results of the review by Bar are included.
  2. I am not able to check the correctness of this patch
     on any existing build type and any MySQL version.
     So it could happen that the new test fails somewhere.

occasionally.

mysql_multi can call mysqld_safe. In doing this it's not changing the 
current working directory. This may cause confusion in the case where 
mysqld_multi is handling instances of servers of different versions 
and the current working directory is the installation directory of one 
of these servers.

Fixed by enhancing the meaning of basedir in [mysqldN] sections of 
mysqld_multi. If specified, mysqld_multi will change the current 
working directory to the basedir directory before starting the server 
in mysqld_multi ... start ... and then change it back to what it was.