BUG#54872 MBR: replication failure caused by using tmp table inside transaction 
      
Changed criteria to classify a statement as unsafe in order to reduce the
number of spurious warnings. So a statement is classified as unsafe when
there is on-going transaction at any point of the execution if:

1. The mixed statement is about to update a transactional table and
a non-transactional table.

2. The mixed statement is about to update a temporary transactional
table and a non-transactional table.
      
3. The mixed statement is about to update a transactional table and
read from a non-transactional table.

4. The mixed statement is about to update a temporary transactional
table and read from a non-transactional table.

5. The mixed statement is about to update a non-transactional table
and read from a transactional table when the isolation level is
lower than repeatable read.

After updating a transactional table if:

6. The mixed statement is about to update a non-transactional table
and read from a temporary transactional table.
 
7. The mixed statement is about to update a non-transactional table
 and read from a temporary transactional table.

8. The mixed statement is about to update a non-transactionala table
   and read from a temporary non-transactional table.
     
9. The mixed statement is about to update a temporary non-transactional
table and update a non-transactional table.
     
10. The mixed statement is about to update a temporary non-transactional
table and read from a non-transactional table.
     
11. A statement is about to update a non-transactional table and the
option variables.binlog_direct_non_trans_update is OFF.

The reason for this is that locks acquired may not protected a concurrent
transaction of interfering in the current execution and by consequence in
the result. So the patch reduced the number of spurious unsafe warnings.

Besides we fixed a regression caused by BUG#51894, which makes temporary
tables to go into the trx-cache if there is an on-going transaction. In
MIXED mode, the patch for BUG#51894 ignores that the trx-cache may have
updates to temporary non-transactional tables that must be written to the
binary log while rolling back the transaction.
      
So we fix this problem by writing the content of the trx-cache to the
binary log while rolling back a transaction if a non-transactional
temporary table was updated and the binary logging format is MIXED.

   Bug#47633 - assert in ha_myisammrg::info during OPTIMIZE
 
   The server crashed on an attempt to optimize a MERGE table with
   non-existent child table.
 
   mysql_admin_table() relied on the table to be successfully open
   if a table object had been allocated.
 
   Changed code to check return value of the open function before
   calling a handler:: function on it.

mysql-test/r/merge.result:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
      Bug#47633 - assert in ha_myisammrg::info during OPTIMIZE
      Updated result file.
mysql-test/t/merge.test:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
      Bug#47633 - assert in ha_myisammrg::info during OPTIMIZE
      Changed tests to respect changed TEMPORARY MERGE locking (unrelated).
      Changed tests to respect changed CREATE TABLE ... LIKE (unrelated).
      Changed tests to respect that no new tables can be created
      under LOCK TABLE (unrelated).
      Added test for Bug#47633.
  Changed error numbers to symbolic names.
  Added test for child locking for ALTER under LOCK TABLE.
  
  Since Bug 36171 is not pushed yet, not the whole patch has been backported.
mysys/my_delete.c:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
      Bug#47633 - assert in ha_myisammrg::info during OPTIMIZE
      Fixed error reporting.
      Fixed indentation.
mysys/my_mmap.c:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
      Bug#47633 - assert in ha_myisammrg::info during OPTIMIZE
      Added DBUG.
sql/item_func.cc:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
  Added Debug Sync point, required by merge_sync.test.
sql/sql_table.cc:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
      Bug#47633 - assert in ha_myisammrg::info during OPTIMIZE
      Do not call handler:: functions if the table was not opened
      successfully.
  Added Debug Sync point, required by merge_sync.test.
storage/myisam/mi_check.c:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
      Bug#47633 - assert in ha_myisammrg::info during OPTIMIZE
      Unmap memory before exchanging data files. Needed on Windows.
storage/myisammrg/ha_myisammrg.cc:
  Backport of revid:ingo.struewing@sun.com-20091223200354-r2uzbdkj2v6yv111
  Added Debug Sync point, required by merge_sync.test.
  
  merge_sync.test will be introduced by a patch for Bug 36171,
  which is not pushed yet.

           DML flow and SAVEPOINT

The problem was that replication could break if a transaction involving
both transactional and non-transactional tables was rolled back to a
savepoint. It broke if a concurrent connection tried to drop a
transactional table which was locked after the savepoint was set.
This DROP TABLE completed when ROLLBACK TO SAVEPOINT was executed as the
lock on the table was dropped by the transaction. When the slave later
tried to apply the binlog, it would fail as the table would already
have been dropped.

The reason for the problem is that transactions involving both
transactional and non-transactional tables are written fully to the
binlog during ROLLBACK TO SAVEPOINT. At the same time, metadata locks
acquired after a savepoint, were released during ROLLBACK TO SAVEPOINT.
This allowed a second connection to drop a table only used between
SAVEPOINT and ROLLBACK TO SAVEPOINT. Which caused the transaction binlog
to refer to a non-existing table when it was written during ROLLBACK
TO SAVEPOINT.

This patch fixes the problem by not releasing metadata locks when
ROLLBACK TO SAVEPOINT is executed if binlogging is enabled.

Accidental change in compile-time definitions for FreeBSD


Revert the accidental setting of "HAVE_BROKEN_REALPATH"
on current versions of FreeBSD,

do it for both autotools ("configure.in")
and cmake ("cmake/os/FreeBSD.cmake").

collections. Originally, they had only been added to default.push, so
trees named after mysql-[trunk|next-mr] would not skip those tests.

Don't call member functions for a NIL pointer.


mysql-test/r/subselect4.result:
  Add test case.
mysql-test/t/subselect4.test:
  Add test case.
sql/sql_select.cc:
  If the (virtual) member function clone_item() returns NULL,
  there is no substitution to be made, and we don't need to set the collation.
  The test was invoking Item_cache::clone_item()

            use limit efficiently
Bug #36569: UPDATE ... WHERE ... ORDER BY... always does a
            filesort even if not required

Also two bugs reported after QA review (before the commit
of bugs above to public trees, no documentation needed):

Bug #53737: Performance regressions after applying patch
            for bug 36569
Bug #53742: UPDATEs have no effect after applying patch
            for bug 36569


Execution of single-table UPDATE and DELETE statements did not use the 
same optimizer as was used in the compilation of SELECT statements. 
Instead, it had an optimizer of its own that did not take into account 
that you can omit sorting by retrieving rows using an index.

Extra optimization has been added: when applicable, single-table 
UPDATE/DELETE statements use an existing index instead of filesort. A 
corresponding SELECT query would do the former.

Also handling of the DESC ordering expression has been added when
reverse index scan is applicable.

From now on most single table UPDATE and DELETE statements show the 
same disk access patterns as the corresponding SELECT query. We verify 
this by comparing the result of SHOW STATUS LIKE 'Sort%

Currently the get_index_for_order function 
a) checks quick select index (if any) for compatibility with the
   ORDER expression list or
b) chooses the cheapest available compatible index, but only if 
   the index scan is cheaper than filesort.
Second way is implemented by the new test_if_cheaper_ordering
function (extracted part the test_if_skip_sort_order()).



mysql-test/r/log_state.result:
  Updated result for optimized query, bug #36569.
mysql-test/r/single_delete_update.result:
  Test case for bug #30584, bug #36569 and bug #53742.
mysql-test/r/update.result:
  Updated result for optimized query, bug #30584.
  Note:
  "Handler_read_last 1" omitted, see bug 52312:
  lost Handler_read_last status variable.
mysql-test/t/single_delete_update.test:
  Test case for bug #30584, bug #36569 and bug #53742.
sql/opt_range.cc:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
  
  * get_index_for_order() has been rewritten entirely and moved
    to sql_select.cc
  
  New QUICK_RANGE_SELECT::make_reverse method has been added.
sql/opt_range.h:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
  
  * get_index_for_order() has been rewritten entirely and moved
    to sql_select.cc
  
  New functions:
  * QUICK_SELECT_I::make_reverse()
  * SQL_SELECT::set_quick()
sql/records.cc:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
  
  * init_read_record_idx() has been modified to allow reverse index scan
  
  New functions:
  * rr_index_last()
  * rr_index_desc()
sql/records.h:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
  
  init_read_record_idx() has been modified to allow reverse index scan
sql/sql_delete.cc:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
      
  mysql_delete: an optimization has been added to skip
  unnecessary sorting with ORDER BY clause where select
  result ordering is acceptable.
sql/sql_select.cc:
  Bug #30584, bug #36569, bug #53737, bug #53742:
    UPDATE/DELETE ... WHERE ... ORDER BY...  always does a filesort
    even if not required
      
  The const_expression_in_where function has been modified
  to accept both Item and Field pointers.
  
  New functions:
  * get_index_for_order()
  * test_if_cheaper_ordering() has been extracted from
    test_if_skip_sort_order() to share with get_index_for_order()
  * simple_remove_const()
sql/sql_select.h:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
      
  New functions:
  * test_if_cheaper_ordering()
  * simple_remove_const()
  * get_index_for_order()
sql/sql_update.cc:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
      
  mysql_update: an optimization has been added to skip
  unnecessary sorting with ORDER BY clause where a select
  result ordering is acceptable.
sql/table.cc:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
  
  New functions:
  * TABLE::update_const_key_parts()
  * is_simple_order()
sql/table.h:
  Bug #30584, bug #36569: UPDATE/DELETE ... WHERE ... ORDER BY...
                          always does a filesort even if not required
  
  New functions:
  * TABLE::update_const_key_parts()
  * is_simple_order()

Fix syntax error (missing space in SET command),  that effectively prevents mysqld from being build with SSL.

Handle this warning in the future as error, this will prevent pushing to main trees.

mysql-test/suite/perfschema/t/no_threads-master.opt:
  Innodb will start multiple threads, which is
  not compatible with --one-thread.   Disable
  innodb to be able to run the test case.

InnoDB came in a new version "simultanously" with the
commit.  This patch is a minor change to the new innodb
regression test suite. 

The default storage engine is changed from MyISAM to
InnoDB, in all builds except for the embedded server.

In addition, the following system variables are 
changed:

  * innodb_file_per_table is enabled
  * innodb_strict_mode is enabled
  * innodb_file_format_name_update is changed
    to 'Barracuda'

The test suite is changed so that tests that do not
explicitly include the have_innodb.inc are run with
--default-storage-engine=MyISAM.  This is to ease the
transition, so that most regression tests are run
with the same engine as before.

Some tests are disabled for the embedded server
regression test, as the output of certain statements
will be different that for the regular server
(i.e SELECT @@default_storage_engine).  This is to
ease transition.



mysql-test/mysql-test-run.pl:
  The regression test suite now adds a
  --default-storage-engine=MyISAM for all non-innodb 
  tests.  This behaviour can be controlled by the
  default-myisam switch in mysql-test-run
mysql-test/t/bootstrap-master.opt:
  The bootstrap test can only be run without InnoDB
  as it starts several mysqld instances on the same
  datadir. This is possible with MyISAM, but not
  with InnoDB.
storage/innobase/CMakeLists.txt:
  Build InnoDB per default
storage/innobase/handler/ha_innodb.cc:
  Change default values for system variables
  
    Enable file_per_table
    Enable strict_mode
    Upgrade default file format to Barracuda

line exceeds the limit

Merge the fix into "trunk-bugfixing".

line exceeds the limit

Upmerge the fix from 5.1 to 5.5 ("trunk").

line exceeds the limit

Upmerge the fix from 5.0 to 5.1

           line exceeds the limit

The number and/or names of our files for the main test suite
(contents of "mysql-test/t/") now exceeds the command line
length limit on AIX.
Solve the problem by using separate "cp" commands for the
various file name extensions.

to trunk-bugfixing, no contents changes (already done separate).