- Fix Histogram::point_selectivity() to work in the case where the 
  passed value_pos=0 (or 1) and the first (or the last) bucket in the 
  histogram has zero value-range (i.e one value).

[Attempt #2]
- Use a new selectivity calculation formula in Histogram::point_selectivity. 
  The formula is different from the old one because it was developed from scratch.
  it doesn't have any possible division-by-zero problems.

- Forgot to update one .result file.

Analysis: XtraDB merge regression, at the end of mutex_spin_wait before goto mutex_loop
there is missing  

if (prio_mutex) { 
	os_atomic_decrement_ulint(&prio_mutex->high_priority_waiters, 1); 
}

Hence we get unbalanced waiter count.

Thanks to Laurynas Biveinis for finding this.

- Save range key before making field->pos_in_interval() call (like we do for non-equality ranges)

Let TABLE_SHARE::tdc.free_tables, TABLE_SHARE::tdc.all_tables,
TABLE_SHARE::tdc.flushed and corresponding invariants be protected by
per-share TABLE_SHARE::tdc.LOCK_table_share instead of global LOCK_open.

Now if CREATE OR REPLACE fails but we have deleted a table already, we will generate a DROP TABLE in the binary log.
This fixes this issue.

In addition, for a failing CREATE OR REPLACE TABLE ... SELECT we don't generate a log of all the inserted rows, only the DROP TABLE.

I added code for not logging DROP TEMPORARY TABLE for tables where the CREATE TABLE was not logged. This code will be activated in 10.1
by removing the code protected by DONT_LOG_DROP_OF_TEMPORARY_TABLES.





mysql-test/suite/rpl/r/create_or_replace_mix.result:
  More test cases
mysql-test/suite/rpl/r/create_or_replace_row.result:
  More test cases
mysql-test/suite/rpl/r/create_or_replace_statement.result:
  More test cases
mysql-test/suite/rpl/t/create_or_replace.inc:
  More test cases
sql/log.cc:
  Added binlog_reset_cache() to clear the binary log.
sql/log.h:
  Added prototype
sql/sql_insert.cc:
  If CREATE OR REPLACE TABLE ... SELECT fails:
  - Don't log anything if nothing changed
  - If table was deleted, log a DROP TABLE.
  Remember if we table creation of temporary tables was logged.
sql/sql_table.cc:
  Added log_drop_table()
  Remember if we table creation of temporary tables was logged.
  If CREATE OR REPLACE TABLE ... SELECT fails and a table was deleted, log a DROP TABLE.
sql/sql_table.h:
  Added prototype
sql/sql_truncate.cc:
  Remember if we table creation of temporary tables was logged.
sql/table.h:
  Added table_creation_was_logged

- Part#2: call HA_EXTRA_FLUSH for the correct handler object, and call it after every change
  (ha_write_row, ha_update_row, ha_delete_row).

mysql-test/r/create_or_replace2.result:
  Added test case
mysql-test/t/create_or_replace.test:
  Fixed comment
mysql-test/t/create_or_replace2.test:
  Added test case
sql/sql_base.cc:
  Safety fix:
  Don't let threads with query_id=0 free temporary tables as this may free temporary tables not in use.
  This is mostly the case for the slave io threads, as most other threads has thd->query_id != 0.
sql/sql_table.cc:
  Added comment.
  Ignore kill when opening temporary table for CREATE ... LIKE.
  This fixed the original isue

- Do like sp.cc does with mysql.proc table: call HA_EXTRA_FLUSH after we've modified
  a statistical table.

Corrected cost estimates when a join buffer is used and the optimizer is requested
to use condition selectivities.

Analysis: This was merge error on file fil0fil.cc. fil_system mutex was taken twice because of this.

Fix: Remove unnecessary mutex_enter and fixed the issue with slow posix_fallocate usage.

- If an UPDATE 1) modifies the key it is using, and 2) has ORDER BY ... LIMIT
  which matches the key it is using,  Then we should use "Using buffer", not
  "Using filesort". 

- Adopt MySQL's fix: don't run index_merge optimizer if the table statistics 
  reports that the table has 0 rows.

MDEV-5819: MySQL Bug #13500371 63704: CONVERSION OF '1.' TO A NUMBER GIVES ERROR 1265 (WARN_DATA_TRUNCATED)

Fix by MySQL ported

Automatic merge, except for server_audit.cc that had to be modified slightly
Changes to xtradb and innobase where ignored was these made no sence for 10.0

Fixed max_length of dynamic columns json/create/add functions.

mysql-test/r/create_or_replace.result:
  Added test of releasing of metadata locks
mysql-test/t/create_or_replace.test:
  Added test of releasing of metadata locks
sql/handler.h:
  Added marker if table was deleted as part of CREATE OR REPLACE
sql/sql_base.cc:
  Added Locked_tables_list::unlock_locked_table()
sql/sql_class.h:
  New prototypes
sql/sql_insert.cc:
  Unlock metadata locks for deleted table in case of error. Also do unlock tables if this was the only locked table.
sql/sql_table.cc:
  Unlock metadata locks for deleted table in case of error. Also do unlock tables if this was the only locked table.

Remove memory warnings if mysql client aborts early
Changed copyright for clients

client/mysql.cc:
  Free memory if get_options fails, so that we don't get warnings from safemalloc
include/welcome_copyright_notice.h:
  Added SkySQL to client copyrights
mysql-test/valgrind.supp:
  Added suppressions for memory leaks from dlopen() for OpenSUSE 12.3
storage/oqgraph/mysql-test/oqgraph/regression_mdev5744.result:
  Suppress warning
storage/oqgraph/mysql-test/oqgraph/regression_mdev5744.test:
  Suppress warning

meaning of the count, and to remove the alpha warning.

MDEV-5804: If same GTID is received on multiple master connections in multi-source replication, the event is double-executed causing corruption or replication failure

Some fixes, mainly to make it work in non-parallel replication mode also
(--slave-parallel-threads=0).

Patch should be fairly complete now.

extra/replace.c:
  Removed compiler warning
sql/unireg.cc:
  Removed compiler warning
storage/maria/ma_blockrec.c:
  Removed compiler warning
storage/maria/ma_dynrec.c:
  Fixed compiler failure
storage/maria/ma_unique.c:
  Removed compiler warning
storage/myisam/mi_check.c:
  Removed compiler warning
storage/myisam/mi_checksum.c:
  Removed compiler warning

Fixed MDEV-5724 "Server crashes on SQL select containing more group by and left join statements using innodb tables"
  
The problem was that a big record was allocated on the stack, which casued stack to run out.
  
Fixed by using my_safe_alloca() instead of my_alloca() when allocating records.
Now only records <= 16384 are allocated on the stack.

mysql-test/r/stack-crash.result:
  Added test case
mysql-test/t/stack-crash.test:
  Added test case
storage/maria/ma_blockrec.c:
  Use my_safe_alloca() instead of my_alloca()
storage/maria/ma_dynrec.c:
  Use my_safe_alloca() instead of my_alloca()
storage/maria/maria_def.h:
  Added MARIA_MAX_RECORD_ON_STACK
storage/maria/maria_pack.c:
  Use my_safe_alloca() instead of my_alloca()

MDEV-5804: If same GTID is received on multiple master connections in multi-source replication, the event is double-executed causing corruption or replication failure

Before, the arrival of same GTID twice in multi-source replication
would cause double-apply or in gtid strict mode an error.

Keep the behaviour, but add an option --gtid-ignore-duplicates which
allows to correctly handle duplicates, ignoring all but the first.
This relies on the user ensuring correct configuration so that
sequence numbers are strictly increasing within each replication
domain; then duplicates can be detected simply by comparing the
sequence numbers against what is already applied.

Only one master connection (but possibly multiple parallel worker
threads within that connection) is allowed to apply events within
one replication domain at a time; any other connection that
receives a GTID in the same domain either discards it (if it is
already applied) or waits for the other connection to not have
any events to apply.

Intermediate patch, as proof-of-concept for testing. The main limitation
is that currently it is only implemented for parallel replication,
@@slave_parallel_threads > 0.

thread IDs