Where realpath(3) is used in Linux, mf_load_path is
used for Windows. This function doesn't however
correspond to the functionality of realpath.
This patch attempts to do better by using 
the Windows function GetFullPathName() instead.

Problem: some call of INET_NTOA() function may lead 
to a crash due to missing its character set initialization.

Fix: explicitly set the character set.


mysql-test/r/func_misc.result:
  Fix for bug#57283: inet_ntoa() crashes
    - test result.
mysql-test/t/func_misc.test:
  Fix for bug#57283: inet_ntoa() crashes
    - test case.
sql/item_strfunc.cc:
  Fix for bug#57283: inet_ntoa() crashes
    - explicitly set buffer's character set.

Problem: if multibyte and binary string arguments passed to 
RPAD(), LPAD() or INSERT() functions, they might return 
wrong results or even lead to a server crash due to missed
character set convertion.

Fix: perform the convertion if necessary.


mysql-test/r/ctype_utf8.result:
  Fix for bug#57272: crash in rpad() when using utf8
    - test result.
mysql-test/t/ctype_utf8.test:
  Fix for bug#57272: crash in rpad() when using utf8
    - test case.
sql/item_strfunc.cc:
  Fix for bug#57272: crash in rpad() when using utf8
    - convert multibyte argument's character set to binary in case of
  FUNCTION(MULTIBYTE_ARG, .., BINARY_ARG,..) for RPAD(), LPAD() and 
  INSERT() functions.

with concurrent lock/unlock tables

Approved by Marko

row_create_table_for_mysql(): When the table creation fails,
free the dict_table_t object.

No mysql-test case. Tested by creating a table, removing a *.frm file and
attempting to create the table again. Code coverage tested by
instrumentation. Tested with Valgrind.

Print an error message to stderr an get rid of the assertion.

Approved by: Jimmy Yang (over IM)

rb://477 approved by Marko

row_search_for_mysql(): Acquire an intention lock on the table
before locking the first record gap.

row_search_for_mysql(): Acquire an intention lock on the table
before locking the first record gap.

LOAD DATA into partitioned MyISAM table

Problem was that both partitioning and myisam
used the same table_share->mutex for different protections
(auto inc and repair).

Solved by adding a specific mutex for the partitioning
auto_increment.

Also adding destroying the ha_data structure in
free_table_share (which is to be propagated
into 5.5).

This is a 5.1 ONLY patch, already fixed in 5.5+.

The crash happens because original join table is replaced with temporary table
at execution stage and later we attempt to use this temporary table in
select_describe. It might happen that
Item_subselect::update_used_tables() method which sets const_item flag
is not called by some reasons (no where/having conditon in subquery for example).
It prevents JOIN::join_tmp creation and breaks original join.
The fix is to call ::update_used_tables() before ::const_item() check.


mysql-test/r/ps.result:
  test case
mysql-test/t/ps.test:
  test case
sql/item_subselect.cc:
  call ::update_used_tables() before ::const_item() check.

Added sanity check, similar to the one preventing send without reap

Bug#57113: ha_partition::extra(ha_extra_function):
            Assertion `m_extra_cache' failed

Fix for bug#55458 included DBUG_ASSERTS causing
debug builds of the server to crash on
another multi-table update.

Removed the asserts since they where wrong.
(updated after testing the patch in 5.5).

mysql-test/r/partition.result:
  updated result
mysql-test/t/partition.test:
  Added test for bug#57113
sql/ha_partition.cc:
  Removed the assert for m_extra_cache when
  ::extra(HA_PREPARE_FOR_UPDATE) was called.

This is a simple optimization issue. All stats are related to only indexed
columns, index size or number of rows in the whole table. UPDATEs that touch
only non-indexed columns cannot affect stats and we can avoid calling the
function row_update_statistics_if_needed() which may result in unnecessary I/O.

Approved by:	Marko (rb://466)