Observed and described
partitioned engine execution time difference
between master and slave was caused by excessive invocation
of base_engine::rnd_init which was done also for partitions
uninvolved into Rows-event operation.
The bug's slave slowdown therefore scales with the number of partitions.

Fixed with applying an upstream patch.

References:
----------
https://bugs.mysql.com/bug.php?id=73648
Bug#25687813 REPLICATION REGRESSION WITH RBR AND PARTITIONED TABLES

           optimizer_use_condition_selectivity = 4

It does not makes sense to try to read statistics for temporary tables
because it's not collected.

This reverts commit d39629f0.

Because running mtr for many hours with no output whatsoever
is not really what we should do.

And in 5.5 `make test` just works anyway, nothing to fix here.

MDEV-16534 PPC64: Unexpected error with a negative value into auto-increment columns in HEAP, MyISAM, ARIA

In this case we are accessing incorrect memory when we have mergeable semi-joins.
In the case when we have mergeable semi joins parent select will have a table count
of all the tables in that select plus all the tables involved in the IN-subquery.
But this table count does not include the "sjm table" (only includes the inner and outer tables)
denotes as <subquery#> in explain.

make it return the same Info values as for the standalone server.

This fixes plugins.processlist for --embedded

make thd_get_error_context_description() to show not just
thd->proc_info, but exactly the same thread state that SHOW PROCESSLIST
shows.

An embedded run will output the full path name instead of a relative
one. Update results to cover both cases.

Check the name of the primary key to be 'PRIMARY'. Than
differs it from any implicit primary keys created by an engine.

When attempting to rename a table to a non-existing database,
InnoDB would misleadingly report "OS error 71" when in fact the
error code is InnoDB's own (OS_FILE_NOT_FOUND), and not report
both pathnames. Errors on rename could occur due to reasons
connected to either pathname.

os_file_handle_rename_error(): New function, to report errors in
renaming files.

Added unregistering writers in case of log error.
Added more debugging control about adding/removing writers to the buffers.

           SELECT .. LIMIT 0 (new variant)

This is another attempt to fix the problem of mdev-14515.

update table->pos_in_table_list during prepare,
just like it's done in normal execution.

otherwise it'll be a dangling pointer

adjust tests

rewrite tautological engine descriptions

On OS X, (u)int64_t is defined as (unsigned) long long int while on 74
bit Linux it is defined as (unsigned) long int.

Ensure the type matches when doing printf on all systems.

Missed printfs from: 21246066

The order of outputting stored procedures is important. Stored
procedures must be available on view creation, for views which make use
of them. Make sure to print them before outputting tables.

Undo the revert that happened by mystake in commit 7fca4b50.

GCC-8 introduced multiple warnings and increased the level of
strictness.

* -Wshadow will warn if a local variable shadows a typedef.
* GCC will also warn when memsetting a non-trivial type.
  In this case a non-trivial type can not have a custom constructor.
  For all intents and purposes, the class is trivially-copyable.
* GCC will also warn if you use too many paranthesses which are not
necessary

This reverts commit 1735fa34.

Assign all tests added via MY_ADD_TEST to a bogus default_ignore target,
so that they are not ran by default when doing bare make test. Add default
test named MTR that calls mysql-test-run suite, which is now the single
test run by make test.

In consequence, modified unit/suite.pm to exclude the MTR test and run the
real ctests flagged for default_ignore target, thus no circular
loop.

Several issues were encountered and fixed as explained bellow:

* missing link to dbug lib;
* user proper fprintf format specifier;
* ZERO_COND_INITIALIZER was using wrong toku_cond_t struct
  initializer for first member of type pthread_cond_t and
  not considering the TOKU_PTHREAD_DEBUG case which has
  one extra struct member of type pfs_key_t;
* Remove likely(!opt_debug_sync_timeout), argument is
  declared extern and not available to Toku;
* pthread_mutex_timedlock() is not available in pthreads
  for Mac, as it's not part of the POSIX pthreads spec.
  The encompassing event_t::wait(ms) methods are unused,
  thus have been removed;

Permissions were probably due to a file copy in:
15f7f5c6 Merge branch 'merge-tokudb-5.6' into 10.0

This is happening because they are declared as packed
and clang has -Waddress-of-packed-member when passing the
address of a packed member, a legit concern on different
architectures. The easiest way to get rid of the errors is to
remove the packed attribute from said structs.

Fix build on macOS 10.13:

39dceaae MDEV-10983: TokuDB does not compile on OS X 10.12
Make use of a different function to get the current tid.
Additionally, librt doesn't exist on OS X. Use System library instead.

 storage/tokudb/PerconaFT/cmake_modules/TokuFeatureDetection.cmake | 4 +++-
 storage/tokudb/PerconaFT/portability/portability.cc               | 9 ++++++++-
 storage/tokudb/PerconaFT/portability/tests/test-xid.cc            | 9 ++++++++-
 storage/tokudb/PerconaFT/portability/toku_config.h.in             | 1 +
 4 files changed, 20 insertions(+), 3 deletions(-)

MDEV-16374: Filtered shows 0 for materilization scan for a semi join, which makes optimizer always picks
materialization scan over materialization lookup

For non-mergeable semi-joins we don't store the estimates of the IN subquery in table->file->stats.records.
In the function TABLE_LIST::fetch_number_of_rows, we store the number of rows in the tables
(estimates in case of derived table/views).
Currently we don't store the estimates for non-mergeable semi-joins, which leads to a problem of selecting
materialization scan over materialization lookup.
Fixed this by storing these estimated appropriately

Fixed  CreateFile() for the log file
- TRUNCATE_EXISTING does not create a new file, use CREATE_ALWAYS
- Make log file handle inheritable