Post merge fix for the bug#28494.

into  moonbone.local:/mnt/gentoo64/work/test-5.1-opt-mysql

  Corrected test case result for the bug#28494.
item_func.h, item_func.cc:
  Corrected function names after fix for the bug#28494.

  Extended test case for the bug#28494.

into  moonbone.local:/mnt/gentoo64/work/test-5.1-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  moonbone.local:/mnt/gentoo64/work/test-5.1-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.

into  olga.mysql.com:/home/igor/mysql-5.1-opt

To avoid unnecessary work the mysql_alter_table function takes the
list of table fields and applies all changes to it (drops/moves/renames/etc).
Then this function compares the new list and the old one. If the changes
require only .frm to be modified then the actual data isn't copied. To detect
changes all columns attributes but names are compared. When a column has been
moved and has replaced another column with the same attributes except name
the mysql_alter_table function wrongly decides that two fields has been just
renamed. As a result the data from the moved column and from all columns
after it is not copied.

Now the mysql_alter_table function forces table data copying by setting
the need_copy_table flag when it finds a moved column. The flag is set at
the stage when the modified fields are created.

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

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.1-opt

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-5.1-opt

  Patch to eliminate compilation error.

```yaml
Added casts and fixed wrong type.
```

Added casts and fixed wrong type.
---
Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.1-marvel
into  a88-113-38-195.elisa-laajakaista.fi:/home/my/bk/mysql-5.1-marvel
---
Don't give warning that readonly variable is forced to be readonly
mysql-test-run run now fails if we have [Warning] and [ERROR] as tags in .err file
Fixed wrong reference to the mysql manual
Fixed wrong prototype that caused some tests to fail on 64 bit platforms
---
Disabled compiler warnings mainly for Win 64.
---
Added casts to remove compiler warnings on windows
Give warnings also for safe_mutex errors found by test system
Added some warnings from different machines in pushbuild
---
Merge bk-internal.mysql.com:/home/bk/mysql-5.1-marvel
into  mysql.com:/home/my/mysql-5.1
---
Added escapes for double quotes and parenthesis.
---
Archive db fix plus added non-critical warnings
in ignore list.
---
Fixed previously added patch and added new ignored warning.

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:/d2/hf/mrg/mysql-5.1-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.1-opt

into  gleb.loc:/home/uchum/work/bk/mysql-5.1-opt

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.

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.

  Post merge fix.

into  moonbone.local:/mnt/gentoo64/work/test-5.1-opt-mysql

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