Problem: LOGGER::general_log_write() relied on valid "thd" parameter passed
but had inconsistent "if (thd)" check.

Fix: as we always pass a valid "thd" parameter to the method, 
redundant check removed.


sql/log.cc:
  Fix for bug#47130: misplaced or redundant check for null pointer?
    - code clean-up, as we rely on the "thd" parameter in the
  LOGGER::general_log_write(), redundant "if (thd)" check removed, 
  added assert(thd) instead.

The problem is that argument buffer can be used as result buffer
and it leads to argument value change.
The fix is to use 'old buffer' as result buffer only
if first argument is not constant item.


mysql-test/r/func_str.result:
  test result
mysql-test/t/func_str.test:
  test case
sql/item_strfunc.cc:
  The problem is that argument buffer can be used as result buffer
  and it leads to argument value change.
  The fix is to use 'old buffer' as result buffer only
  if first argument is not constant item.

In RBR, There is an inconsistency between slaves and master.
When INSERT statement which includes an auto_increment field is executed,
Store engine of master will check the value of the auto_increment field. 
It will generate a sequence number and then replace the value, if its value is NULL or empty.
if the field's value is 0, the store engine will do like encountering the NULL values 
unless NO_AUTO_VALUE_ON_ZERO is set into SQL_MODE.
In contrast, if the field's value is 0, Store engine of slave always generates a new sequence number 
whether or not NO_AUTO_VALUE_ON_ZERO is set into SQL_MODE.

SQL MODE of slave sql thread is always consistency with master's.
Another variable is related to this bug.
If generateing a sequence number is decided by the values of
table->auto_increment_field_not_null and SQL_MODE(if includes MODE_NO_AUTO_VALUE_ON_ZERO)
The table->auto_increment_is_not_null is FALSE, which causes this bug to appear. ..

partial backport of bug43138 fix


mysql-test/r/warnings.result:
  test result
mysql-test/t/warnings.test:
  test case
sql/sql_class.cc:
  partial backport of bug43138 fix
sql/sql_class.h:
  partial backport of bug43138 fix
sql/sql_table.cc:
  partial backport of bug43138 fix

on Windows in dbug.c) -- part 2: a patch for the DBUG subsystem
to detect misuse of DBUG_ENTER / DBUG_RETURN macros.
5.1 version.

Archive engine returns wrong values for average record length
and max data length.

With this fix they're calculated as following:
- max data length is 2 ^ 63 where large files are supported
  and INT_MAX32 where this is not supported;
- average record length is data length / records in data file.

mysql-test/r/archive.result:
  A test case for BUG#29203.
mysql-test/t/archive.test:
  A test case for BUG#29203.
storage/archive/ha_archive.cc:
  Better estimation for average row length and maximal data
  file length.

Create temporary InnoDB table fails on case insensitive
filesystems, when lower_case_table_names is 2 (e.g. OS X)
and temporary directory path contains upper case letters.

The problem was that tmpdir prefix was converted to lower
case when table was created, but was passed as is when
table was opened.

Fixed by leaving tmpdir prefix part intact.

mysql-test/r/lowercase_mixed_tmpdir_innodb.result:
  A test case for BUG#45638.
mysql-test/t/lowercase_mixed_tmpdir_innodb-master.opt:
  A test case for BUG#45638.
mysql-test/t/lowercase_mixed_tmpdir_innodb-master.sh:
  A test case for BUG#45638.
mysql-test/t/lowercase_mixed_tmpdir_innodb.test:
  A test case for BUG#45638.
sql/handler.cc:
  Fixed get_canonical_filename() to not lowercase filesystem
  path prefix for temporary tables.

Updates the results of all the out-dated test suites and adds 
the special mysqltest command to enable innodb for the tests that need it.

      
The parser rule for expressions in a udf parameter list contains 
two hacks: 
First, the parser input stream is read verbatim, bypassing 
the lexer.
Second, the Item::name field is overwritten. If the argument to a
udf was a field, the field's name as seen by name resolution was
overwritten this way.
If the field name was quoted or escaped, it would appear as e.g. "`field`".
Fixed by not overwriting field names.

mysql-test/r/udf.result:
  Bug#46259: Test result.
mysql-test/t/udf.test:
  Bug#46259: Test case.
sql/sql_yacc.yy:
  Bug#46259: Fix.

This test case uses mysqlbinlog to dump the content of master-bin.000001,
but the content of master-bin.000001 is not that this test needs.

MTR runs a lot of test cases on one server, so when this test starts, the current binlog file
might not be master-bin.000001, or there are other events are written by tests before.
'RESET MASTER' command must be called at the begin, it ensures that binlog of this test
is wrote to master-bin.000001 correctly.  

Three other tests have the same problem, They were fixed together.
mysqlbinlog-cp932
binlog_incident
binlog_tmp_table

Postfix.
extra/rpl_tests/rpl_row_sp006.test had changed to fix this bug.
extra/rpl_tests/rpl_row_sp006.test is also referenced by rpl_ndb_sp006,
So rpl_row_sp006.result must be changed too.

 
The external 'for' loop in remove_dup_with_compare() handled 
HA_ERR_RECORD_DELETED by just starting over without advancing 
to the next record which caused an infinite loop. 
 
This condition could be triggered on certain data by a SELECT 
query containing DISTINCT, GROUP BY and HAVING clauses. 

Fixed remove_dup_with_compare() so that we always advance to 
the next record when receiving HA_ERR_RECORD_DELETED from 
rnd_next(). 

mysql-test/r/distinct.result:
  Added a test case for bug #46159.
mysql-test/t/distinct.test:
  Added a test case for bug #46159.
sql/sql_select.cc:
  Fixed remove_dup_with_compare() so that we always advance to 
  the next record when receiving HA_ERR_RECORD_DELETED from 
  rnd_next().

           The plugin feature is disabled, you need HAVE_DLOPEN

Selectively skip tests that require dynamic loading (ie: static builds).

mysql-test/include/have_dynamic_loading.inc:
  Add require file.
mysql-test/t/ps_not_windows.test:
  Test requires dynamic loading support.

on subquery inside a SP 

Problem: repeated call of a SP containing an incorrect query with a 
subselect may lead to failed ASSERT().

Fix: set proper sublelect's state in case of error occured during 
subquery transformation.


mysql-test/r/sp.result:
  Fix for bug#46629: Item_in_subselect::val_int(): Assertion `0' 
  on subquery inside a SP 
    - test result.
mysql-test/t/sp.test:
  Fix for bug#46629: Item_in_subselect::val_int(): Assertion `0' 
  on subquery inside a SP 
    - test case.
sql/item_subselect.cc:
  Fix for bug#46629: Item_in_subselect::val_int(): Assertion `0' 
  on subquery inside a SP 
    - don't set Item_subselect::changed in the Item_subselect::fix_fields()
  if an error occured during subquery transformation.
  That prevents us of further processing incorrect subqueries after 
  Item_in_subselect::select_in_like_transformer().

SELECT with join (not only self-join) from archive table may
return incomplete result set, when result set size exceeds
join buffer size.

The problem was that archive row counter was initialzed too
early, when ha_archive::info() method was called. Later,
when optimizer exceeds join buffer, it attempts to reuse
handler without calling ha_archive::info() again (which is
correct).

Fixed by moving row counter initialization from
ha_archive::info() to ha_archive::rnd_init().

mysql-test/r/archive.result:
  A test case for BUG#46961.
mysql-test/t/archive.test:
  A test case for BUG#46961.
storage/archive/ha_archive.cc:
  Since a cursor may get reused without a call to ::info(),
  move assignment of scan_rows to a proper place, that is
  ::rnd_init().

Memory allocated in TMP_TABLE_PARAM::copy_field is not cleaned up.
The fix is to clean up TMP_TABLE_PARAM::copy_field array in JOIN::destroy.


mysql-test/r/explain.result:
  test result
mysql-test/t/explain.test:
  test case
sql/sql_select.cc:
  Memory allocated in TMP_TABLE_PARAM::copy_field is not cleaned up.
  The fix is to clean up TMP_TABLE_PARAM::copy_field array in JOIN::destroy.

                    name as existing view

When trying to create a table with the same name as existing view with
join, mysql server crashes.

The problem is when create table is issued with the same name as view, while
verifying with the existing tables, we assume that base table object is 
created always.

In this case, since it is a view over multiple tables, we don't have the 
mysql derived table object.

Fixed the logic which checks if there is an existing table to not to assume
that table object is created when the base table is view over multiple 
tables.

mysql-test/r/create.result:
  BUG#46384 - mysqld segfault when trying to create table with same 
              name as existing view
  
  Testcase for the bug
mysql-test/t/create.test:
  BUG#46384 - mysqld segfault when trying to create table with same 
              name as existing view
  
  Testcase for the bug
sql/sql_insert.cc:
  BUG#46384 - mysqld segfault when trying to create table with same 
                  name as existing view
      
  Fixed create_table_from_items() method to properly check, if the base table 
  is a view over multiple tables.

                                for CREATE TABLE...LIKE...

Add my_sync.c to mysqltest sources list in CMakeLists.txt

client/CMakeLists.txt:
  BUG#46591 - .frm file isn't sync'd with sync_frm enabled
              for CREATE TABLE...LIKE...
  
  Add my_sync.c to mysqltest sources list

Inserting a negative value in the autoincrement column of a
partitioned innodb table was causing the value of the auto
increment counter to wrap around into a very large positive
value. The consequences are the same as if a very large positive
value was inserted into a column, e.g. reduced autoincrement
range, failure to read autoincrement counter.

The current patch ensures that before calculating the next
auto increment value, the current value is within the positive
maximum allowed limit.

mysql-test/suite/parts/inc/partition_auto_increment.inc:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Adds tests for performing insert,update and delete on a partition
  table with negative auto_increment values.
mysql-test/suite/parts/r/partition_auto_increment_innodb.result:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Result file for the innodb engine.
mysql-test/suite/parts/r/partition_auto_increment_memory.result:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Result file for the memory engine.
mysql-test/suite/parts/r/partition_auto_increment_myisam.result:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Result file for the myisam engine.
mysql-test/suite/parts/r/partition_auto_increment_ndb.result:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Result file for the ndb engine.
mysql-test/suite/parts/t/partition_auto_increment_archive.test:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Adds a variable that allows the Archive engine to skip tests
  that involve insertion of negative auto increment values.
mysql-test/suite/parts/t/partition_auto_increment_blackhole.test:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Adds a variable that allows the Blackhole engine to skip tests
  that involve insertion of negative auto increment values.
sql/ha_partition.cc:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Ensures that the current value is lesser than the upper limit
  for the type of the field before setting the next auto increment
  value to be calculated.
sql/ha_partition.h:
  Bug#45823 Assertion failure in file row/row0mysql.c line 1386
  
  Modifies the set_auto_increment_if_higher function, to take
  into account negative auto increment values when doing a
  comparison.

      
Essentially, Bug#45574 results in this bug. The 'CREATE DATABASE IF NOT EXISTS' statement was not 
binlogged, when the database has existed.
Sometimes, the master and slaves become inconsistent. The "CREATE DATABASE
IF NOT EXISTS mysqltest1" statement is not binlogged
if the db 'mysqltest1' existed before the test case is executed. 
So the db 'mysqltest1' can't be created on slave.
     
Patch of Bug#45574 has resolved this problem. 
But I think it is better to replace 'mysqltest1' by default db 'test'.

myisamchk tool generates warnings when run on an myisam files (.MYI or .MYD)
This is because of the conversion of max_value for certain options in myisamchk 
from singed long to unsigned long

The max value for the options key_buffer_size, read_buffer_size, write_buffer
_size and sort_buffer_size is given as (long) ~0L which becomes -1  when casted
from signed long to longlong and then casted to ulonglong. When (ulonglong) -1 
is compared with maximal value for GET_ULONG data type, we adjust it to 
(ulonglong) ULONG_MAX and throw the warning.

Fixed by using the right max size.

Max values for the variables (from mysqld.cc)
----------------------------
1. key_buffer_size
   5.0: ULONG_MAX
   5.1: SIZE_T_MAX
   6.0: SIZE_T_MAX

2. read_buffer_size and write_buffer_size
   5.0: INT_MAX32
   5.1: INT_MAX32
   6.0: INT_MAX32

3. sort_buffer_size (aka myisam_sort_buffer_size)
   5.0: UINT_MAX32
   5.1: ULONG_MAX
   6.0: ULONG_MAX

Note: testcase not attached

myisam/myisamchk.c:
  Bug#33785 - myisamchk show warning message
      
  Fixed the Max value for key_buffer_size, read_buffer_size, write_buffer_size and
  sort_buffer_size options

  function,file sql_base.cc

When uncacheable queries are written to a temp table the optimizer must 
preserve the original JOIN structure, because it is re-using the JOIN 
structure to read from the resulting temporary table.
This was done only for uncacheable sub-queries. 
But top level queries can also benefit from this mechanism, specially if 
they're using index access and need a reset.
Fixed by not limiting the saving of JOIN structure to subqueries
exclusively.
Added a new test file to extend the existing (large) subquery.test.