into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug28728

into  moonbone.local:/mnt/gentoo64/work/test-5.0-opt-mysql

  Post fix for bug#28494.
  The Item_func_set_user_var::check method now silently doesn't use result_field
  if it isn't defined.

into  olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug28728

into  moonbone.local:/mnt/gentoo64/work/test-5.0-opt-mysql

This is an additional fix.
Item::val_xxx methods are supposed to use original data source and
Item::val_xxx_result methods to use the item's result field. But for the
Item_func_set_user_var class val_xxx_result methods were mapped to val_xxx
methods. This leads, in particular, to producing bad sort keys and thus
wrong order of the result set of queries with group by/order by clauses.

The set of val_xxx_result methods is added to the Item_func_set_user_var
class. It's the same as the val_xxx set of method but uses the result_field
to return a value.

using a derived table over a grouping subselect.

This crash happens only when materialization of the derived tables 
requires creation of auxiliary temporary table, for example when
a grouping operation is carried out with usage of a temporary table.

The crash happened because EXPLAIN EXTENDED when printing the query
expression made an attempt to use the objects created in the mem_root
of the temporary table which has been already freed by the moment
when printing is called.

This bug appeared after the method Item_field::print() had been 
introduced.    

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-opt

into  magare.gmz:/home/kgeorge/mysql/autopush/B28366-5.0-opt-win

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt

  Additional patch for bug #28244 to workaround valgrind warnings.

into  moonbone.local:/mnt/gentoo64/work/28494-bug-5.0-opt-mysql

The end_update() function uses the Item::save_org_in_field() function to
save original values of items into the group buffer. But for the 
Item_func_set_user_var this method was mapped to the save_in_field method.
The latter function wrongly decides to use the result_field. This leads to
saving incorrect value in the grouping buffer and wrong result of the whole
query.

The can_use_result_field argument of the bool type is added to the
Item_func_set_user_var::save_in_field() function. If it is set to FALSE
then the item's result field won't be used. Otherwise it will be detected
whether the result field will be used (old behaviour).
Two wrapping functions for the function above are added to the 
Item_func_set_user_var class:
the save_in_field(Field *field, bool no_conversions) - it calls the above
function with the can_use_result_field set to TRUE.
the save_org_in_field(Field *field) - same, but the can_use_result_field
is set to FALSE.

ON conditions from JOIN expression were ignored at CHECK OPTION
check when updating a multi-table view with CHECK OPTION.

The st_table_list::prep_check_option function has been
modified to to take into account ON conditions at CHECK OPTION check
It was also changed to build the check option condition only once
for any update used in PS/SP.

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt-28244

  Patch to eliminate compilation warning.

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt-28244

When the same VIEW was created at the master side twice,
malformed (truncated after the word 'AS') query string 
was forwarded to client side, so error messages on the
master and client was different, and replication was
broken.

The mysql_register_view function call failed
too early: fields of `view' output argument of this 
function was not filled yet with correct data required
for query replication.
The mysql_register_view function also copied pointers to 
local buffers into a memory allocated by the caller.

into  mysql.com:/nfsdisk1/lars/bk/mysql-5.0-rpl

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt-28598

mysqld crashed when a long-running explain query was killed from
another connection.

When the current thread caught a kill signal executing the function
best_extension_by_limited_search it just silently returned to  
the calling function greedy_search without initializing elements of
the join->best_positions array.
However, the greedy_search function ignored thd->killed status
after a calls to the best_extension_by_limited_search function, and
after several calls the greedy_search function used an uninitialized
data from the join->best_positions[idx] to search position in the
join->best_ref array. 
That search failed, and greedy_search tried to call swap_variables
function with NULL argument - that caused a crash.

refining the test because of Bug #28786 'reset master' does not reset binlogging on embeded server

ENUM fields internally store their values as integers and may use integer
values as indexes to their values. Invalid values are mapped to zero value.
When storing an empty string the ENUM field fails to find an appropriate value
and tries to convert the provided string to integer. The conversion also
fails and error is returned even if the thd->count_cuted_fields is set to
CHECK_FIELD_IGNORE. This makes the range optimizer wrongly decide that an
impossible range is present.

Now the Field_enum::store() returns error while storing an empty string only
if the thd->count_cuted_fields isn't set to CHECK_FIELD_IGNORE.

into  dl145s.mysql.com:/users/mhansson/mysql/autopush/my50-bug28250

into  mysql.com:/home/gluh/MySQL/Merge/5.0-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt-28716

  Fixed bug #28716: additional patch to eliminate compilation
  error under Windows.

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.0-opt-28716

into  magare.gmz:/home/kgeorge/mysql/autopush/B28492-5.0-opt

test comments correction