The Item_func_set_user_var::register_field_in_read_map() did not check 
that the result_field was null.This caused server crashes for queries that
required order by such a field and were executed without using a temporary
table.

The Item_func_set_user_var::register_field_in_read_map() now checks the
result_field to be not null.

into  mysql.com:/misc/mysql/31177/51-31177

into  mysql.com:/misc/mysql/31177/51-31177

additional fixes for BDB and correct assignment of both signed
and unsigned 64-bit data to unsigned system variables

into  dl145s.mysql.com:/data0/mhansson/my51-bug30234

additional fixes for 64-bit
---
Merge mysql.com:/misc/mysql/31177/50-31177
into  mysql.com:/misc/mysql/31177/51-31177
---
Bug#31177: Server variables can't be set to their current values

additional 5.1 fixes (for plugins)

into  dl145s.mysql.com:/data0/mhansson/my51-bug30234

Restores files that were automerged during null merge.

into  linux-st28.site:/home/martin/mysql/src/bug30234/my51-bug30234

Anti-patch. This patch undoes the previously pushed patch. It is 
null-merged in versions 5.1 and above since there the original 
patch is still desired.

additional fixes for 64-bit

extra 5.1 fixes

into  mysql.com:/misc/mysql/31177/51-31177

5.1+ specific fixes (plugins etc.)

into  mysql.com:/misc/mysql/31177/51-31177

into  mysql.com:/misc/mysql/32707/51-32707

into  mysql.com:/home/hf/work/mrg/my51-mrg

into  mysql.com:/misc/mysql/32180/51-32180

into  mysql.com:/home/hf/work/mrg/my51-mrg

into  mysql.com:/home/hf/work/mrg/my50-mrg

into  mysql.com:/home/hf/work/mrg/my50-mrg

into  mysql.com:/home/hf/work/mrg/my50-mrg

into  mysql.com:/home/hf/work/mrg/my51-mrg

into  mysql.com:/home/hf/work/mrg/my51-mrg

PS-protocol data is stored in different format - the MYSQL_RECORDS->data
contains the link to the record content, not to array of the links to
the field's contents. So we have to handle it separately for
embedded-server query cache.

into  mysql.com:/home/hf/work/mrg/my41-mrg

into  polly.(none):/home/kaa/src/opt/mysql-5.1-opt

into  polly.(none):/home/kaa/src/opt/bug9481/my51-bug9481

removed unnecessary privilege checks for I_S schema

filesort() uses file->estimate_rows_upper_bound() call to allocate
internal buffers. If this function returns a value smaller than
a number of row that will be returned later in find_all_keys(),
that can cause server crash.
Fixed by implementing ha_federated::estimate_rows_upper_bound() to
return maximum possible number of rows.
Present estimation for FEDERATED always returns 0 if the linked to the VIEW.

into  mysql.com:/misc/mysql/32707/51-32707

into  mysql.com:/misc/mysql/32707/50-32707

Default values of variables were not subject to upper/lower bounds
and step, while setting variables was. Bounds and step are also
applied to defaults now; defaults are corrected quietly, values
given by the user are corrected, and a correction-warning is thrown
as needed. Lastly, very large values could wrap around, starting
from 0 again. They are bounded at the maximum value for the
respective data-type now if no lower maximum is specified in the
variable's definition.

Denormalized DOUBLE-s can't be properly handled by old MIPS processors.
So we need to enable specific mode for them so IRIX will do use
software round to handle such numbers. 

server status wasn't properly sent to the client after the error
by the embedded server. Wasn't noticed before as one usually stopped
retrieving results after he gets an error.

into  mysql.com:/home/psergey/mysql-5.1-bug32772

added new func mysql_create_like_schema_frm() which creates frm file based on I_S table

The bug was that for ordered index scans, ha_partition::index_init() did
not put index columns into table->read_set if the underlying storage 
engine did not have HA_PARTIAL_COLUMN_READ flag. 
This was causing assertion failure when handle_ordered_index_scan() tried
to sort the records according to index order.

Fixed by making ha_partition::index_init() put index columns into table->read_set
for all ordered scans.