performance degradation.

Filesort + join cache combination is preferred to full index scan because it
is usually faster. But it's not the case when the index is clustered one.

Now test_if_skip_sort_order function prefers filesort only if index isn't
clustered.

mysql-test/r/innodb_mysql.result:
  Added a test case for the bug#50843.
mysql-test/t/innodb_mysql.test:
  Added a test case for the bug#50843.
sql/sql_select.cc:
  Bug#50843: Filesort used instead of clustered index led to
  performance degradation.
  Now test_if_skip_sort_order function prefers filesort only if index isn't
  clustered.

Propagation of a large unsigned numeric constant
in the WHERE expression led to wrong result.

For example,
"WHERE a = CAST(0xFFFFFFFFFFFFFFFF AS USIGNED) AND FOO(a)",
where a is an UNSIGNED BIGINT, and FOO() accepts strings,
was transformed to "... AND FOO('-1')".

That has been fixed.

Also EXPLAIN EXTENDED printed incorrect numeric constants in
transformed WHERE expressions like above. That has been
fixed too.


mysql-test/r/bigint.result:
  Added test case for bug #45360.
mysql-test/t/bigint.test:
  Added test case for bug #45360.
sql/item.cc:
  Bug #45360: wrong results
  
  As far as Item_int_with_ref (and underlaying Item_int)
  class accepts both signed and unsigned 64bit values,
  Item_int::val_str and Item_int::print methods have been
  modified to take into account unsigned_flag.

 
The problem was in an incorrect debug assertion. The expression 
used in the failing assertion states that when finding 
references matching ORDER BY expressions, there can be only one 
reference to a single table. But that does not make any sense, 
all test cases for this bug are valid examples with multiple 
identical WHERE expressions referencing the same table which
are also present in the ORDER BY list. 
 
Fixed by removing the failing assertion. We also have to take 
care of the 'found' counter so that we count multiple 
references only once. We rely on this fact later in 
eq_ref_table(). 

mysql-test/r/join.result:
  Added a test case for bug #50335.
mysql-test/t/join.test:
  Added a test case for bug #50335.
sql/sql_select.cc:
  Removing the assertion in eq_ref_table() as it does not make
  any sense. We also have to take care of the 'found' counter so 
  that we count multiple references only once. We rely on this 
  fact later in eq_ref_table().

backporting of bug@30703 to 5.1.
The fixes are backed up with a regression test.



mysql-test/include/test_fieldsize.inc:
  waiting to stop is to be actually exclusively for SQL thread.
mysql-test/suite/rpl/r/rpl_show_slave_running.result:
  new results file is added.
mysql-test/suite/rpl/t/rpl_show_slave_running.test:
  regression test for bug#30703 is added.
sql/mysqld.cc:
  refining `show status like slave_running' handler to correspond to one of
  `show slave status'.
sql/slave.cc:
  A dbug-sync point is added to complement the regression test.

WL#5154 and WL5182

Two result files in the sys_vars suite wasn't 
properly updated after the change in
deprecation text

"TYPE=storage_engine" is deprecated, and will be removed
in the Celosia release of MySQL.  Since the option is
present in the Betony release and the version number of
Celosia is still not decided, we need to bump the
deprecation version number back up to "6.0".

MySQL with gcc 4.3.2
      
This is the final patch in the context of this bug. 

cmd-line-utils/readline/rlmbutil.h:
  Changed in a previous patch, reverted by a backport.
cmd-line-utils/readline/text.c:
  Static var initialization.
extra/yassl/include/yassl_error.hpp:
  SetErrorString handles errors outside of the YasslError
  enum.
extra/yassl/src/ssl.cpp:
  SetErrorString handles errors outside of the YasslError
  enum.
extra/yassl/src/yassl_error.cpp:
  SetErrorString handles errors outside of the YasslError
  enum.

When EXPLAIN EXTENDED tries to print column names, it checks whether the
referenced table is CONST (in which case, the column's value rather than
its name will be printed). If no proper table is reference (i.e. because
a derived table was used that has since gone out of scope), this will fail
spectacularly.

This ports an equivalent of the fix for Bug 43354.

mysql-test/r/func_gconcat.result:
  Show that EXPLAIN EXTENDED on a GROUP_CONCAT() on a derived table
  no longer crashes the server.
mysql-test/t/func_gconcat.test:
  Show that EXPLAIN EXTENDED on a GROUP_CONCAT() on a derived table
  no longer crashes the server.
sql/item_sum.cc:
  Do not de-ref what cannot be, that is, temp-tables that have gone away.
  This is of questionable utility anyway, since our deref has the sole
  purpose of checking whether the table is const (in which case, we'll
  substitute the column with its value in EXPLAIN EXTENDED - that is all).

CHECK_FIELD_IGNORE was treated as CHECK_FIELD_ERROR_FOR_NULL;
UPDATE...SET...NULL on NOT NULL fields behaved differently after
a trigger.

Now distinguishes between IGNORE and ERROR_FOR_NULL and save/restores
check-field options.

mysql-test/r/trigger.result:
  Show that UPDATE...SET...NULL on NOT NULL columns doesn't behave differently
  when run after a trigger.
mysql-test/t/trigger.test:
  Show that UPDATE...SET...NULL on NOT NULL columns doesn't behave differently
  when run after a trigger.
sql/field_conv.cc:
  CHECK_FIELD_IGNORE was treated as CHECK_FIELD_ERROR_FOR_NULL.
  Distinguish between the two.
sql/sp_head.cc:
  raise error as needed
sql/sql_class.cc:
  Save and restore check-fields options.
sql/sql_class.h:
  Make room so we can save check-fields options.
sql/sql_insert.cc:
  raise error as needed

Fixed the test to behave correctly with ps-protocol
and binlog format row.

 - Changes to the banner text
 - Use older AC_PROG_LIBTOOL (Bug#51009)

scripts/mysql_install_db.sh
 - Changes to banner text

Added --max-connections= argument to mysqltest and mtr
Small fix to first patch: forgot to check before free'ing connections array

Table corruption happens during table reading in ha_tina::find_current_row() func.
Field::store() method returns error(true) if stored value is 0.
The fix:
added special case for enum type which correctly processes 0 value.
Additional fix:
INSERT...(default) and INSERT...() have the same behaviour now for enum type.


mysql-test/r/csv.result:
  test result
mysql-test/r/default.result:
  result fix
mysql-test/t/csv.test:
  test case
sql/item.cc:
  Changes:
  do not print warning for 'enum' type if there is no default value.
  set default value.
storage/csv/ha_tina.cc:
  Table corruption happens during table reading in ha_tina::find_current_row() func.
  Field::store() method returns error(true) if stored value is 0.
  The fix:
  added special case for enum type which correctly processes 0 value.

Some logic would group by suite always
Disable this if using --noreorder
Also fix getting array from collect_one_suite() in this case
Amended according to previous comment

A "%define" is no shell command, so it must not be the
only line in the "then" or "else" branch of an "if".

Add a ':' line to make the branch non-empty.

due to ifdef of include file

sql/sql_table.cc:
  removed if defined since DEBUG_SYNC macro is defined in that
  include file.

The problem is that during temporary table creation uneven bits
are not taken into account for hidden fields. It leads to incorrect
calculation&allocation of null bytes size for table record. And
if grouped value is null we set wrong bit for this value(see end_update()).
Fixed by adding separate calculation of uneven bit for hidden fields.


mysql-test/r/type_bit.result:
  test case
mysql-test/t/type_bit.test:
  test case
sql/sql_select.cc:
  added separate calculation of uneven bit for hidden fields

Fixed a compilation warning.