******
manual merge 5.0-bugteam --> 5.1-bugteam (bug 38816)

            procedures causes crashes!

The problem of that bugreport was mostly fixed by the
patch for bug 38691.
However, attached test case focused on another crash or
valgrind warning problem: SHOW PROCESSLIST query accesses
freed memory of SP instruction that run in a parallel
connection.

Changes of thd->query/thd->query_length in dangerous
places have been guarded with the per-thread
LOCK_thd_data mutex (the THD::LOCK_delete mutex has been
renamed to THD::LOCK_thd_data).


sql/ha_myisam.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  Modification of THD::query/query_length has been guarded
  with the a THD::set_query() method call/LOCK_thd_data
  mutex.
  Unnecessary locking with the global LOCK_thread_count
  mutex has been removed.
sql/log_event.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  Modification of THD::query/query_length has been guarded
  with the THD::set_query()) method call/LOCK_thd_data
  mutex.
sql/slave.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  Modification of THD::query/query_length has been guarded
  with the THD::set_query() method call/LOCK_thd_data mutex.
  
  The THD::LOCK_delete mutex has been renamed to
  THD::LOCK_thd_data.
sql/sp_head.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  Modification of THD::query/query_length has been guarded
  with the a THD::set_query() method call/LOCK_thd_data
  mutex.
sql/sql_class.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  The new THD::LOCK_thd_data mutex and THD::set_query()
  method has been added to guard modifications of THD::query/
  THD::query_length fields, also the Statement::set_statement()
  method has been overloaded in the THD class.
  
  The THD::LOCK_delete mutex has been renamed to
  THD::LOCK_thd_data.
sql/sql_class.h:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  The new THD::LOCK_thd_data mutex and THD::set_query()
  method has been added to guard modifications of THD::query/
  THD::query_length fields, also the Statement::set_statement()
  method has been overloaded in the THD class.
  
  The THD::LOCK_delete mutex has been renamed to
  THD::LOCK_thd_data.
sql/sql_insert.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  Modification of THD::query/query_length has been guarded
  with the a THD::set_query() method call/LOCK_thd_data
  mutex.
sql/sql_parse.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  Modification of THD::query/query_length has been guarded
  with the a THD::set_query() method call/LOCK_thd_data mutex.
sql/sql_repl.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  The THD::LOCK_delete mutex has been renamed to
  THD::LOCK_thd_data.
sql/sql_show.cc:
  Bug #38816: kill + flush tables with read lock + stored
              procedures causes crashes!
  
  Inter-thread read of THD::query/query_length field has
  been protected with a new per-thread LOCK_thd_data
  mutex in the mysqld_list_processes function.

In create_myisam_from_heap() mark all errors as fatal except 
HA_ERR_RECORD_FILE_FULL for a HEAP table.

Not doing so could lead to problems, e.g. in a case when a
temporary MyISAM table gets overrun due to its MAX_ROWS limit
while executing INSERT/REPLACE IGNORE ... SELECT. 
The SELECT execution was aborted, but the error was 
converted to a warning due to IGNORE clause, so neither 'ok' 
nor 'error' packet could be sent back to the client. This 
condition led to hanging client when using 5.0 server, or 
assertion failure in 5.1.


mysql-test/r/insert_select.result:
  Added a test case for bug #46075.
mysql-test/t/insert_select.test:
  Added a test case for bug #46075.
sql/sql_select.cc:
  In create_myisam_from_heap() mark all errors as fatal except 
  HA_ERR_RECORD_FILE_FULL for a HEAP table.

Problem was that a failing rename just left the partitions at the state
it was at the failure.

Solution was to try to revert the started rename if a failure occured.

mysql-test/r/partition_not_embedded.result:
  Bug#30102: Rename table does corrupt tables with partition files on failure
  
  New result file
mysql-test/t/partition_not_embedded.test:
  Bug#30102: Rename table does corrupt tables with partition files on failure
  
  New test file
  (list_files does not report the files in embedded)
sql/ha_partition.cc:
  Bug#30102: Rename table does corrupt tables with partition files on failure
  
  Better error handling for rename partitions (reverting the started rename
  operation)
  
  Different order of files for delete.
sql/handler.cc:
  Bug#30102: Rename table does corrupt tables with partition files on failure
  
  Tries to remove as many table files as possible
  if the first delete succeeds.

"WL#4584 New euckr characters" from 5.4.
(as agreed on ServerPT meeting on July 8).

not logged
        
Errors encountered during initialization of the SSL subsystem
are printed to stderr, rather than to the error log.
        
This patch adds a parameter to several SSL init functions to
report the error (if any) out to the caller. The function
init_ssl() in mysqld.cc is moved after the initialization of
the log subsystem, so that any error messages can be logged to
the error log. Printing of messages to stderr has been 
retained to get diagnostic output in a client context.


include/violite.h:
  Adding an enumeration for the various errors that can
  occur during initialization of the SSL module.
sql/mysqld.cc:
  Adding more logging of SSL init errors, and moving
  init_ssl() till after initialization of logging 
  subsystem.
vio/viosslfactories.c:
  Define error strings, provide an access method for these
  strings, and maintain an error parameter in several funcs
  to return the error (if any) to the caller.

binlog
      
The fix for BUG 43929 introduced a regression issue. In a nutshell, when a
statement that changes a non-transactional table fails, it is written to the
binary log with the error code appended. Unfortunately, after BUG 43929, this
failure was flushing the transactional chace causing mismatch between execution
and logging histories. To fix this issue, we avoid flushing the transactional
cache when a commit or rollback is not issued.

When during the optimization an item is moved to the upper select
the item's context left unchanged. This caused wrong result in the 
PS/SP mode.
The Item_ident::remove_dependence_processor now sets the context
of the select to which the item is moved to.

mysql-test/r/subselect.result:
  The test case for the bug#46051 is adjusted.
mysql-test/t/subselect.test:
  The test case for the bug#46051 is adjusted.
sql/item.cc:
  Bug#46051: Incorrectly market field caused wrong result.
  The Item_ident::remove_dependence_processor now sets the context
  of the select to which the item is moved to.

Append the patch for resolving the problems, which have been brought by commiting bug#45214.

In a subselect all fields from outer selects are marked as dependent on
selects they are belong to. In some cases optimizer substitutes it for an
equivalent expression. For example "a_field IN (SELECT outer_field)" is
substituted with "a_field = outer_field". As we moved the outer_field to the
upper select it's not really outer anymore. But it was left marked as outer.
If exists an index over a_field optimizer choose wrong execution plan and thus
return wrong result.

Now the Item_in_subselect::single_value_transformer function removes dependent
marking from fields when a subselect is optimized away.

mysql-test/r/subselect.result:
  Added a test case for the bug#46051.
mysql-test/t/subselect.test:
  Added a test case for the bug#46051.
sql/item_subselect.cc:
  Bug#46051: Incorrectly market field caused wrong result.
  Now the Item_in_subselect::single_value_transformer function removes dependent
  marking from fields when a subselect is optimized away.

       
Fixed various compilation warnings when compiling on a 
 64 bit windows.

        
The "get_master_version_and_clock(...)" function in sql/slave.cc ignores 
error and passes directly when queries fail, or queries succeed 
but the result retrieved is empty.
  
The "get_master_version_and_clock(...)" function should try to reconnect master
if queries fail because of transient network problems, and fail otherwise.
The I/O thread should print a warning if the some system variables do not 
exist on master (very old master)

mysql-test/extra/rpl_tests/rpl_get_master_version_and_clock.test:
  Added test file for bug #45214
mysql-test/suite/rpl/r/rpl_get_master_version_and_clock.result:
  Added test result for bug #45214
mysql-test/suite/rpl/t/rpl_get_master_version_and_clock.test:
  Added test file for bug #45214
sql/slave.cc:
  The 'is_network_error()' function is added for checking if the error is caused by network.
  Added a new return value (2) to 'get_master_version_and_clock()' function result set 
  to indicate transient network errors when queries fail, and the caller should 
  try to reconnect in this case.

          table

The MERGE table storage engine does not support the HA_CAN_SQL_HANDLE feature
and any attempt to open the merge table will fail with ER_ILLEGAL_HA.

After an error occurred the tables that was opened must be closed again
or they will be left in an inconsistent state. However, the assumption
made in the code for closing and register handler tables was that only
one table will be opened, and this is not true for MERGE tables which
will cause multiple tables to open.

The next time a SELECT operation was issued on the merge table it
caused the system to freeze.

This patch fixes this issue by making sure that all tables which
are opened also are closed in the event of an error.


mysql-test/r/merge.result:
  Added test case for bug 45781
mysql-test/t/merge.test:
  Added test case for bug 45781
sql/sql_handler.cc:
  * mysql_ha_open() was never ment to open more than one table. If we encounter more tables, we should
    close all tables related to the current substatement and raise an exception.

Merge Konstantin's patch and add a test case.

tests/mysql_client_test.c:
  Add test case for Bug#44495

failed"

Do not assume that SQL prepared statements always run in text protocol.
When invoked from a stored procedure, which is itself invoked
by means of prepared CALL statement, the protocol may be binary.
Juggle with the protocol only when we want to change it
to binary in COM_STMT_EXECUTE, COM_STMT_PREPARE.

This is a backport from 5.4/6.0, where the bug was fixed
as part of WL#4264 "Backup: Stabilize Service Interface"