The pthread_cond_wait implementations for windows might
dead lock in some rare circumstances.

1) One thread (I) enter a timed wait and at a point in
   time ends up after mutex unlock and before
   WaitForMultipleObjects(...)
2) Another thread (II) enters pthread_cond_broadcast.
   Grabs the mutex and discovers one waiter. It set
   the broadcast event and closes the broadcast gate
   then unlocks the mutex.
3) A third thread (III) issues a pthread_cond_signal.
   It grabs the mutex, discovers one waiter, sets the
   signal event then unlock the mutex.
4) The first threads (I) enters WaitForMultipleObjects
   and finds out that the signal object is in a
   signalled state and exits the wait.
5) Thread (I) grabs the mutex and checks result status.
   The number of waiters is decreased and becomes equal
   to 0. The event returned was a signal event so the
   broadcast gate isn't opened. The mutex is released.
6) Thread (II) issues a new broadcast. The mutex is
   acquired but the number of waiters are 0 hence
   the broadcast gate remains closed.
7) Thread (I) enters the wait again but is blocked by
   the broadcast gate.

      This fix resolves the above issue by always resetting
      broadcast gate when there are no more waiters in th queue.


mysys/my_wincond.c:
  * Always reset the broadcast gate if there are no more waiters left.

Mask part of EXPLAIN output with '#' to account for varying row count estimation.

mysql-test/include/mix1.inc:
  Mask 'rows' column in EXPLAIN output (number varies sometimes between 1 and 2).
mysql-test/r/innodb_mysql.result:
  Update result file after masking of rows estimation in EXPLAIN output.

1. BUG#46256 - drop table with unknown collation crashes innodb

Note: No testcase attached and has to be verified manually

Detailed revision comments:

r5799 | calvin | 2009-09-09 20:47:31 +0300 (Wed, 09 Sep 2009) | 10 lines
branches/5.1: fix bug#46256

Allow tables to be dropped even if the collation is not found,
but issue a warning.

Could not find an easy way to add mysql-test since it requires
changes to charsets and restarting the server. Tests were
executed manually.

Approved by: Heikki (on IM)
r5805 | vasil | 2009-09-10 08:41:48 +0300 (Thu, 10 Sep 2009) | 7 lines
branches/5.1:

Fix a compilation warning caused by c5799:

handler/ha_innodb.cc: In function 'void innobase_get_cset_width(ulint, ulint*, ulint*)':
handler/ha_innodb.cc:830: warning: format '%d' expects type 'int', but argument 2 has type 'ulint'

BUG#44369 - InnoDB: Does not uniformly disallow disallowed column names

Detailed revision comments:

r5741 | jyang | 2009-09-03 07:16:01 +0300 (Thu, 03 Sep 2009) | 5 lines
branches/5.1: Block creating table with column name conflicting
with Innodb reserved key words. (Bug #44369) rb://151 approved
by Sunny Bains.


r5760 | jyang | 2009-09-04 07:07:34 +0300 (Fri, 04 Sep 2009) | 3 lines
branches/5.1: This is to revert change 5741. A return status for
create_table_def() needs to be fixed.

r5834 | jyang | 2009-09-11 00:43:05 +0300 (Fri, 11 Sep 2009) | 5 lines
branches/5.1: Block creating table with column name conflicting
with Innodb reserved key words. (Bug #44369) rb://151 approved
by Sunny Bains.

1. BUG#46000 - using index called GEN_CLUST_INDEX crashes server

Detailed revision comments:

r5895 | jyang | 2009-09-15 03:39:21 +0300 (Tue, 15 Sep 2009) | 5 lines
branches/5.1: Disallow creating index with the name of
"GEN_CLUST_INDEX" which is reserved for the default system
primary index. (Bug #46000) rb://149 approved by Marko Makela.

SELECT ... WHERE ... IN (NULL, ...) does full table scan,
even if the same query without the NULL uses efficient range scan.

The bugfix for the bug 18360 introduced an optimization:
if
  1) all right-hand arguments of the IN function are constants
  2) result types of all right argument items are compatible
     enough to use the same single comparison function to
     compare all of them to the left argument,

then

  we can convert the right-hand list of constant items to an array
  of equally-typed constant values for the further
  QUICK index access etc. (see Item_func_in::fix_length_and_dec()).

The Item_null constant item objects have STRING_RESULT
result types, so, as far as Item_func_in::fix_length_and_dec()
is aware of NULLs in the right list, this improvement efficiently
optimizes IN function calls with a mixed right list of NULLs and
string constants. However, the optimization doesn't affect mixed
lists of NULLs and integers, floats etc., because there is no
unique common comparator.


New optimization has been added to ignore the result type
of NULL constants in the static analysis of mixed right-hand lists.
This is safe, because at the execution phase we care about
presence of NULLs anyway.

1. The collect_cmp_types() function has been modified to optionally
   ignore NULL constants in the item list.
2. NULL-skipping code of the Item_func_in::fix_length_and_dec()
   function has been modified to work not only with in_string
   vectors but with in_vectors of other types.


mysql-test/r/func_in.result:
  Added test case for the bug #44139.
mysql-test/t/func_in.test:
  Added test case for the bug #44139.
sql/item_cmpfunc.cc:
  Bug #44139: Table scan when NULL appears in IN clause
  
  1. The collect_cmp_types() function has been modified to optionally
     ignore NULL constants in the item list.
  2. NULL-skipping code of the Item_func_in::fix_length_and_dec()
     function has been modified to work not only with in_string
     vectors but with in_vectors of other types.

rpl.rpl_trigger.test fails with valgrind errors with the innodb plugin

The problem is that there is only one autoinc value associated with 
the query when binlogging. If more than one autoinc values are used 
in the query, the autoinc values after the first one can be inserted 
wrongly on slave. So these autoinc values can become inconsistent on 
master and slave.

The problem is resolved by marking all the statements that invoke 
a trigger or call a function that updated autoinc fields as unsafe, 
and will switch to row-format in Mixed mode. Actually, the statement 
is safe if just one autoinc value is used in sub-statement, but it's 
impossible to check how many autoinc values are used in sub-statement.)

mysql-test/suite/rpl/r/rpl_auto_increment_update_failure.result:
  Test result for bug#45677
mysql-test/suite/rpl/t/rpl_auto_increment_update_failure.test:
  Added test to verify the following two properties:
  P1) insert/update in an autoinc column causes statement to 
  be logged in row format if binlog_format=mixed
  P2) if binlog_format=mixed, and a trigger or function contains 
      two or more inserts/updates in a table that has an autoinc 
      column, then the slave should not go out of sync, even if 
      there are concurrent transactions.
sql/sql_base.cc:
  Added function 'has_write_table_with_auto_increment' to check 
  if one (or more) write tables have auto_increment columns.
  
  Removed function 'has_two_write_locked_tables_with_auto_increment', 
  because the function is included in function 
  'has_write_table_with_auto_increment'.

                    Removes the need of a hack (the jump to label).

sql/sql_parse.cc:
  DBUG macros are wrapped inside a loop. Allow to break
  the command switch from within a DBUG macro.

On Mac OS X or Windows, sending a SIGHUP to the server or a
asynchronous flush (triggered by flush_time), would cause the
server to crash.

The problem was that a hook used to detach client API handles
wasn't prepared to handle cases where the thread does not have
a associated session.

The solution is to verify whether the thread has a associated
session before trying to detach a handle.

mysql-test/r/federated_debug.result:
  Add test case result for Bug#47525
mysql-test/t/federated_debug-master.opt:
  Debug point.
mysql-test/t/federated_debug.test:
  Add test case for Bug#47525
sql/slave.cc:
  Check whether a the thread has a associated session.
sql/sql_parse.cc:
  Add debug code to simulate a reload without thread session.

Make configure.js bail with an error if trying to build bdb from a bzr
tree.

Copy mysql-stress-run.pl into noinstall package.

          'flush tables' crashes

The server crashes when 'show procedure status' and 'flush tables' are
run concurrently.

This is caused by the way mysql.proc table is added twice to the list
of table to lock although the requirements on the current locking API
assumes differently.

No test case is submitted because of the nature of the crash which is 
currently difficult to reproduce in a deterministic way.

This is a backport from 5.1

myisam/mi_dbug.c:
  * check_table_is_closed is only used in EXTRA_DEBUG mode but since it is
  iterating over myisam shared data it still needs to be protected by an
  appropriate mutex.
sql/sql_yacc.yy:
  * Since the I_S mechanism is already handling the open and close of 
  mysql.proc there is no need for the method sp_add_to_query_tables.

The 'BEGIN/COMMIT/ROLLBACK' log event could be filtered out if the
database is not selected by --database option of mysqlbinlog command.
This can result in problem if there are some statements in the
transaction are not filtered out.

To fix the problem, mysqlbinlog will output 'BEGIN/ROLLBACK/COMMIT' 
in regardless of the database filtering rules.

client/mysqlbinlog.cc:
  Skip the database check for BEGIN/COMMIT/ROLLBACK log events.
mysql-test/r/mysqlbinlog.result:
  Test result for bug#46998
mysql-test/suite/binlog/t/binlog_row_mysqlbinlog_db_filter.test:
  The test case is updated duo to the patch of bug#46998
mysql-test/t/mysqlbinlog.test:
  Added test to verify if the 'BEGIN', 'COMMIT' and 'ROLLBACK' are output
  in regardless of database filtering

The 'BEGIN/COMMIT/ROLLBACK' log event could be filtered out if the
database is not selected by --database option of mysqlbinlog command.
This can result in problem if there are some statements in the
transaction are not filtered out.

To fix the problem, mysqlbinlog will output 'BEGIN/ROLLBACK/COMMIT' 
in regardless of the database filtering rules.

client/mysqlbinlog.cc:
  Skip the database check for BEGIN/COMMIT/ROLLBACK log events.
mysql-test/r/mysqlbinlog.result:
  Test result for bug#46998
mysql-test/t/mysqlbinlog.test:
  Added test to verify if the 'BEGIN', 'COMMIT' and 'ROLLBACK' are output
  in regardless of database filtering

Backport from 6.0 to 5.1.
Only those sync points are included, which are used in debug_sync.test.

  The Debug Sync Facility allows to place synchronization points
  in the code:
  
  open_tables(...)
  
  DEBUG_SYNC(thd, "after_open_tables");
  
  lock_tables(...)
  
  When activated, a sync point can
  
  - Send a signal and/or
  - Wait for a signal
  
  Nomenclature:
  
  - signal:            A value of a global variable that persists
                       until overwritten by a new signal. The global
                       variable can also be seen as a "signal post"
                       or "flag mast". Then the signal is what is
                       attached to the "signal post" or "flag mast".
  
  - send a signal:     Assign the value (the signal) to the global
                       variable ("set a flag") and broadcast a
                       global condition to wake those waiting for
                       a signal.
  
  - wait for a signal: Loop over waiting for the global condition until
                       the global value matches the wait-for signal.
  
  Please find more information in the top comment in debug_sync.cc
  or in the worklog entry.


.bzrignore:
  WL#4259 - Debug Sync Facility
  Added the symbolic link libmysqld/debug_sync.cc.
CMakeLists.txt:
  WL#4259 - Debug Sync Facility
  Added definition for ENABLED_DEBUG_SYNC.
configure.in:
  WL#4259 - Debug Sync Facility
  Added definition for ENABLED_DEBUG_SYNC.
include/my_sys.h:
  WL#4259 - Debug Sync Facility
  Added definition for the DEBUG_SYNC_C macro.
libmysqld/CMakeLists.txt:
  WL#4259 - Debug Sync Facility
  Added sql/debug_sync.cc.
libmysqld/Makefile.am:
  WL#4259 - Debug Sync Facility
  Added sql/debug_sync.cc.
mysql-test/include/have_debug_sync.inc:
  WL#4259 - Debug Sync Facility
  New include file.
mysql-test/mysql-test-run.pl:
  WL#4259 - Debug Sync Facility
  Added option --debug_sync_timeout.
mysql-test/r/debug_sync.result:
  WL#4259 - Debug Sync Facility
  New test result.
mysql-test/r/have_debug_sync.require:
  WL#4259 - Debug Sync Facility
  New require file.
mysql-test/t/debug_sync.test:
  WL#4259 - Debug Sync Facility
  New test file.
mysys/my_static.c:
  WL#4259 - Debug Sync Facility
  Added definition for debug_sync_C_callback_ptr.
mysys/thr_lock.c:
  WL#4259 - Debug Sync Facility
  Added sync point "wait_for_lock".
sql/CMakeLists.txt:
  WL#4259 - Debug Sync Facility
  Added debug_sync.cc and debug_sync.h.
sql/Makefile.am:
  WL#4259 - Debug Sync Facility
  Added debug_sync.cc and debug_sync.h.
sql/debug_sync.cc:
  WL#4259 - Debug Sync Facility
  New source file.
sql/debug_sync.h:
  WL#4259 - Debug Sync Facility
  New header file.
sql/mysqld.cc:
  WL#4259 - Debug Sync Facility
  Added opt_debug_sync_timeout.
  Added calls to debug_sync_init() and debug_sync_end().
  Fixed a purecov comment (unrelated).
sql/set_var.cc:
  WL#4259 - Debug Sync Facility
  Added server variable "debug_sync".
sql/set_var.h:
  WL#4259 - Debug Sync Facility
  Added declaration for server variable "debug_sync".
sql/share/errmsg.txt:
  WL#4259 - Debug Sync Facility
  Added error messages ER_DEBUG_SYNC_TIMEOUT and ER_DEBUG_SYNC_HIT_LIMIT.
sql/sql_base.cc:
  WL#4259 - Debug Sync Facility
  Added sync points "after_flush_unlock" and "before_lock_tables_takes_lock".
sql/sql_class.cc:
  WL#4259 - Debug Sync Facility
  Added initialization for debug_sync_control to THD::THD.
  Added calls to debug_sync_init_thread() and debug_sync_end_thread().
sql/sql_class.h:
  WL#4259 - Debug Sync Facility
  Added element debug_sync_control to THD.
storage/myisam/myisamchk.c:
  Fixed a typo in an error message string (unrelated).