Both of our own implementations of rint(3) were inconsistent with the
most common behavior of rint() on those platforms that have it: round
to nearest, break ties by rounding to nearest even.

Fixed by leaving just one implementation of rint() in our source tree,
and changing its behavior to match the most common native
implementations on other platforms.

configure.in:
  Added checks for fenv.h and fesetround().
include/config-win.h:
  Removed the incorrect implementation of rint() for Windows.
include/my_global.h:
  Added an rint() implementation for platforms that do not have it.
mysql-test/r/func_math.result:
  Added a test case for bug #15936.
mysql-test/t/func_math.test:
  Added a test case for bug #15936.
sql/mysqld.cc:
  Explicitly set the FPU rounding mode with fesetround().

mysql-test/t/query_cache_28249.test:
  Test depends on process state (not updated under embedded)

                  
If secure-file-priv was set on slave, it became unable to execute
LOAD DATA INFILE statements sent from master using mixed or
statement-based replication.
                  
This patch fixes the issue by ignoring this security restriction
and checking if the files are created and read by the slave in the
--slave-load-tmpdir while executing the SQL Thread.

related to the backport of the patch for bug#38719

sql/ha_partition.cc:
  bug#40003, archive does not handle dup_key.

Updated with the correct error message.

Moved the test case for the bug into a separate file (and restored the 
original innodb_mysql test setup).
Used the new wait_show_condition test macro to avoid the usage of sleep

mysql-test/include/wait_show_condition.inc:
  Bug #42419: new test macro to wait for a row in SHOW to have a certain value.
mysql-test/r/innodb_bug42419.result:
  Bug #42419: test case
mysql-test/r/innodb_mysql.result:
  Bug #42419: revert to the original innodb_mysql test
mysql-test/t/innodb_bug42419.test:
  Bug #42419: test case
mysql-test/t/innodb_mysql-master.opt:
  Bug #42419: revert to the original innodb_mysql test
mysql-test/t/innodb_mysql.test:
  Bug #42419: revert to the original innodb_mysql test

These are only 5.0's fixes being merged.
5.1 and 6.0 Unix-removals will occur in different patches.

Re-enabling mysqlbinlog.test on Windows - removed the use of grep/sed

The problem is that select queries executed concurrently with
a concurrent insert on a MyISAM table could be cached if the
select started after the query cache invalidation but before
the unlock of tables performed by the concurrent insert. This
race could happen because the concurrent insert was failing
to prevent cache of select queries happening at the same time.

The solution is to add a 'uncacheable' status flag to signal
that a concurrent insert is being performed on the table and
that queries executing at the same time shouldn't cache the
results.

mysql-test/r/query_cache_debug.result:
  Add test case result for Bug#41098
mysql-test/t/disabled.def:
  Re-enable test case.
mysql-test/t/query_cache_debug.test:
  Add test case for Bug#41098
sql/sql_cache.cc:
  Debug sync point for regression testing purposes.
sql/sql_insert.cc:
  Remove meaningless query cache invalidate. There is already
  a preceding invalidate for queries that started before the
  concurrent insert.
storage/myisam/ha_myisam.cc:
  Check for a active concurrent insert.
storage/myisam/mi_locking.c:
  Signal the start of a concurrent insert. Flag is zeroed once
  the state is updated back.
storage/myisam/myisamdef.h:
  Add flag to signal a active concurrent insert.

Replaced Unix calls with mysql-test-run's built-in functions / SQL manipulation where possible.
Replaced error codes with error names as well.
Disabled two tests on Windows due to more complex Unix command usage
See Bug#41307, Bug#41308

1. Constant values of binlog positions replaced by seeking them in binlog/relay log.
2. Updated result file

connections
The problem is that tables can enter open table cache for a thread without 
being properly cleaned up. This can happen if make_join_statistics() fails 
to read a const table because of e.g. a deadlock. It does set a member of 
TABLE structure to a value it allocates, but doesn't clean-up this setting 
on error nor does it set the rest of the members in JOIN to allow for 
automatic cleanup.
As a result when such an error occurs and the next statement depends re-uses 
the table from the open tables cache it will get it with this 
TABLE::reginfo.join_tab pointing to a memory area that's freed.
Fixed by making sure make_join_statistics() cleans up TABLE::reginfo.join_tab 
on error.

mysql-test/r/innodb_mysql.result:
  Bug #42419: test case
mysql-test/t/innodb_mysql-master.opt:
  Bug #42419: increase the timeout so it covers te conservative 
  sleep 3 in the test
mysql-test/t/innodb_mysql.test:
  Bug #42419: test case
sql/sql_select.cc:
  Bug #42419: clean up the members of TABLE on failure in 
          make_join_statisitcs()

In case of ROW item each compared pair does not
check if argumet collations can be aggregated and
thus appropiriate item conversion does not happen.
The fix is to add the check and convertion for ROW
pairs.


mysql-test/r/row.result:
  test result
mysql-test/t/row.test:
  test case
sql/item.cc:
  added agg_item_set_converter() function which was a part of
  agg_item_charsets() func. The only difference is that
  agg_item_set_converter() checks and converts items 
  using already known collation.
sql/item.h:
  added agg_item_set_converter() function
sql/item_cmpfunc.cc:
  In case of ROW item each compared pair does not
  check if argumet collations can be aggregated and
  thus appropiriate item conversion does not happen.
  The fix is to add the check and convertion for ROW
  pairs.

configure.in

Replacing AC_CHECK_FUNC+AC_CHECK_LIB combination with
AC_SEARCH_LIBS.

returns short string value. 
 
Multibyte character sets were not taken into account when 
calculating max_length in Item_param::convert_str_value(). As a 
result, string parameters of a prepared statement could be 
truncated later when calculating string length in characters by 
dividing length in bytes by the charset's mbmaxlen value (e.g. in 
Field_varstring::store()). 
 
Fixed by taking charset's mbmaxlen into account when calculating 
max_length in Item_param::convert_str_value().


sql/item.cc:
  Multiply string's length in characters by charset's mbmaxlen when 
  calculating max_length.
tests/mysql_client_test.c:
  Added a test case for bug #41078.

post push fix, Bug#38719, additional test cases updated

handler::get_dup_key used the called handler for the
info call, but used table->file handler for errkey.
Fixed by using table->file->info instead.

mysql-test/r/partition_error.result:
  Bug#38719: Partitioning returns a different error code for
  a duplicate key error
  
  Added test for verification
mysql-test/t/partition_error.test:
  Bug#38719: Partitioning returns a different error code for
  a duplicate key error
  
  Added test for verification

Backport from 6.0

Changed error message to show that it is partitioning
that does not support foreign keys yet.

Changed spelling from British english to American english.

mysql-test/r/partition.result:
  Bug#36001: Partitions: spelling and using some error messages
  
  Backport from 6.0
  
  Changed spelling from British english to American english.
mysql-test/r/partition_mgm_err.result:
  Bug#36001: Partitions: spelling and using some error messages
  
  Backport from 6.0
  
  Changed spelling from British english to American english.
mysql-test/t/partition.test:
  Bug#36001: Partitions: spelling and using some error messages
  
  Backport from 6.0
  
  Added test for verifying error message
sql/share/errmsg.txt:
  Bug#36001: Partitions: spelling and using some error messages
  
  Backport from 6.0
  
  Changed spelling from British english to American english.
sql/sql_table.cc:
  Bug#36001: Partitions: spelling and using some error messages
  
  Backport from 6.0
  
  Using a better error message.