The reason for the failures was bug #21205 (fixed in 6.0 by dtoa, but still present in 5.0/5.1).

mysql-test/r/type_float.result:
  Modified the failing test case so that bug #21205 does not occur.
mysql-test/t/type_float.test:
  Modified the failing test case so that bug #21205 does not occur.

Bug #41173 rpl_packet fails sporadically on pushbuild: query 'DROP TABLE t1' failed


The both issues appeared to be a race between the SQL thread executing CREATE table t1
and the IO thread that is expected to stop at the consequent big size event.
The two events need serialization which is implemented.
The early bug required back-porting a part fixes for bug#38350 exclusively for 5.0 version.



mysql-test/r/rpl_packet.result:
  results changed due to bug#33420, bug#41173.
mysql-test/t/rpl_packet.test:
  adding synchronization for sql and io thread (bug#41173 problem).
  simplifying the output to show only a relevant info (5.0 sole problem bug#33420).

                    bigint' fails on windows.

Visual Studio does not take into account some x86 hardware limitations
which leads to incorrect results when converting large DOUBLE values
to BIGINT UNSIGNED ones.

Fixed by adding a workaround for double->ulonglong conversion on
Windows.


include/config-win.h:
  Added double2ulonglong(double) function implementing a workaround for
  broken double->ulonglong conversion on Windows/x86.
include/my_global.h:
  Define double2ulonglong() as a simple typecast for anything but
  Windows.
mysql-test/r/type_float.result:
  Added a test case for bug #27483.
mysql-test/t/type_float.test:
  Added a test case for bug #27483.

                  
Updated MySQL time handling code to react correctly on UTC leap second additions.
MySQL functions that return the OS current time, like e.g. CURDATE(), NOW() etc
will return :59:59 instead of :59:60 or 59:61.
As a result the reader will receive :59:59 for 2 or 3 consecutive seconds 
during the leap second.
This fix will not affect the values returned by UNIX_TIMESTAMP() for leap seconds.
But note that when converting the value returned by UNIX_TIMESTAMP() to broken 
down time the correction of leap seconds will still be applied.
Note that this fix will make a difference *only* if the OS is specially configured
to return leap seconds from the OS time calls or when using a MySQL time zone 
defintion that has leap seconds.
Even after this change date/time literals (or other broken down time 
representations) with leap seconds (ending on :59:60 or 59:61) will still be 
considered illegal and discarded by the server with an error or 
a warning depending on the sql mode.
Added a test case to demonstrate the effect of the fix.

mysql-test/r/timezone3.result:
  Bug #39920: test case
mysql-test/std_data/Moscow_leap:
  Bug #39920: updated the Moscow time zone to Dr. Olson's tzdata 2008i 
  to accomodate for the 2008 leap second
mysql-test/t/timezone3.test:
  Bug #39920: test case
sql/tztime.cc:
  Bug #39920: adjust leap seconds (:60 or :61) to :59
sql/tztime.h:
  Bug #39920: adjust leap seconds (:60 or :61) to :59

by using and taking out a full path.

mysql-test/r/ctype_filesystem.result:
  Bug #37399: use MYSQL_TEST_DIR rooted test
mysql-test/t/ctype_filesystem-master.opt:
  Bug #37399: use MYSQL_TEST_DIR rooted test
mysql-test/t/ctype_filesystem.test:
  Bug #37399: use MYSQL_TEST_DIR rooted test

TABLE_LIST doesn't free Strings in its string lists
(TABLE_LIST::use_index and TABLE_liST::ignore_index), so
calling c_ptr_safe() on that Strings leads to memleaks.
OTOH "safe" c_ptr_safe() is not necessary there and we can
replace it with c_ptr().

Diff to actual 5.0-bugteam is revno: 2725 only

            an error

Even after the fix for bug 28701 visible behaviors of
SELECT FROM a view and SELECT FROM a regular table are
little bit different:

1. "SELECT FROM regular table USE/FORCE/IGNORE(non
   existent index)" fails with a "ERROR 1176 (HY000):
   Key '...' doesn't exist in table '...'"

2. "SELECT FROM view USING/FORCE/IGNORE(any index)" fails
   with a "ERROR 1221 (HY000): Incorrect usage of
   USE/IGNORE INDEX and VIEW".  OTOH "SHOW INDEX FROM
   view" always returns empty result set, so from the point
   of same behaviour view we trying to use/ignore non
   existent index.

To harmonize the behaviour of USE/FORCE/IGNORE(index)
clauses in SELECT from a view and from a regular table the
"ERROR 1221 (HY000): Incorrect usage of USE/IGNORE INDEX
and VIEW" message has been replaced with the "ERROR 1176
(HY000): Key '...' doesn't exist in table '...'" message
like for tables and non existent keys.


mysql-test/r/view.result:
  Added test case for bug #33461.
  Updated test case for bug 28701.
mysql-test/t/view.test:
  Added test case for bug #33461.
  Updated test case for bug 28701.
sql/sql_view.cc:
  Bug #33461: SELECT ... FROM <view> USE INDEX (...) throws
              an error
  
  To harmonize the behaviour of USE/FORCE/IGNORE(index)
  clauses in SELECT from a view and from a regular table the
  "ERROR 1221 (HY000): Incorrect usage of USE/IGNORE INDEX
  and VIEW" message has been replaced with the "ERROR 1176
  (HY000): Key '...' doesn't exist in table '...'" message
  like for tables and non existent keys.

      
The SHOW VARIABLES LIKE .../SELECT @@/SELECT ... FROM INFORMATION_SCHEMA.VARIABLES
were assuming that all the system variables are in system charset (UTF-8).
However the variables that are settable through command line will have a different
character set (character_set_filesystem).
Fixed the server to remember the correct character set of basedir, datadir, tmpdir,
ssl, plugin_dir, slave_load_tmpdir, innodb variables; init_connect and init_slave 
variables and use it when processing data.

mysql-test/r/ctype_filesystem.result:
  Bug #37339: test case (should be in utf-8)
mysql-test/t/ctype_filesystem-master.opt:
  Bug #37339: test case (should be in ISO-8859-1)
mysql-test/t/ctype_filesystem.test:
  Bug #37339: test case
sql/mysqld.cc:
  Bug #37339: remember the correct character set for init_slave and init_connect
sql/set_var.cc:
  Bug #37339: 
    - remember the character set of the relevant variables
    - implement storing and using the correct 
      character set
sql/set_var.h:
  Bug #37339: implement storing and using the correct 
  character set
sql/sql_show.cc:
  Bug #37339: implement storing and using the correct 
  character set

mysql-test/r/perror-win.result:
  pushbuild failure fix
mysql-test/t/perror-win.test:
  pushbuild failure fix
sql/item_func.cc:
  pushbuild failure fix

The bug is repeatable with latest(1.0.1) InnoDB plugin on Linux, Win,
If MySQL is compiled with valgrind there are errors about
using of uninitialized variable(orig_table).
The fix is to set field->orig_table correct value.


mysql-test/r/innodb_mysql.result:
  test result
mysql-test/t/innodb_mysql.test:
  test case
sql/sql_base.cc:
  set field->orig_table to 'table' value because it may be bogus and
  it leads to crash on Field_string::type() function.

enable uncacheable flag if we update a view with check option
and check option has a subselect, otherwise, the check option
can be evaluated after the subselect was freed as independent
(See full_local in JOIN::join_free())


mysql-test/r/subselect.result:
  test result
mysql-test/t/subselect.test:
  test case
sql/mysql_priv.h:
  added UNCACHEABLE_CHECKOPTION flag
sql/sql_update.cc:
  enable uncacheable flag if we update a view with check option
  and check option has a subselect, otherwise, the check option
  can be evaluated after the subselect was freed as independent
  (See full_local in JOIN::join_free())

set DATE|DATETIME value to 0 if ALLOW_INVALID_DATES sql_mode is not enabled.


sql/field.cc:
  set DATE|DATETIME value to 0 if ALLOW_INVALID_DATES sql_mode is not enabled.
tests/mysql_client_test.c:
  test case

extended perror to enable printing of Win32 system errors


extra/perror.c:
  extended perror to enable printing of Win32 system errors
mysql-test/r/perror-win.result:
  test result
mysql-test/t/perror-win.test:
  test case

We pretended that TIMEDIFF() would always return positive results;
this gave strange results in comparisons of the TIMEDIFF(low,hi)<TIME(0)
type that rendered a negative result, but still gave false in comparison.
We also inadvertantly dropped the sign when converting times to
decimal.

CAST(time AS DECIMAL) handles signs of the times correctly.
TIMEDIFF() marked up as signed. Time/date comparison code switched to
signed for clarity.

mysql-test/r/func_sapdb.result:
  show that time-related comparisons work with negative
  time values now.
  show that converting time to DECIMAL no longer drops sign.
mysql-test/t/func_sapdb.test:
  show that time-related comparisons work with negative
  time values now.
  show that converting time to DECIMAL no longer drops sign.
sql/item_cmpfunc.cc:
  signed returns
sql/item_cmpfunc.h:
  signed now (time/date < > =)
sql/item_func.cc:
  signed now
sql/item_timefunc.h:
  Functions such as TIMEDIFF() return signed results!
  The file-comments pretended we were doing that all along, anyway...
sql/my_decimal.cc:
  heed sign when converting time to my_decimal;
  times may actually be negative!
  Needed for SELECT CAST(time('-73:42:12') AS DECIMAL);
sql/mysql_priv.h:
  using signed for dates and times now

Problem: in 5.0 'check table for upgrade' doesn't detect
incompatible collation changes made in 5.0.48.

Fix: backport #39585 fix to 5.0


sql/handler.cc:
  Fix for bug#40984: backport fix from 39585 into 5.0
    - backport of #39585 fix
sql/handler.h:
  Fix for bug#40984: backport fix from 39585 into 5.0
    - backport of #39585 fix

Altering how MTR checks global variable status to exclude timestamp
Changed SQL statements to update style.

ONLY_FULL_GROUP_BY

The check for non-aggregated columns in queries with aggregate function, but without
GROUP BY was treating all the parts of the query as if they are in the SELECT list.
Fixed by ignoring the non-aggregated fields in the WHERE clause.

mysql-test/r/func_group.result:
  Bug #39656: test case
mysql-test/t/func_group.test:
  Bug #39656: test case
sql/sql_select.cc:
  Bug #39656: ignore the new non-aggregated column refs in a WHERE
  by saving the state so far and then adding only the new values of the other
  parts of the bitmask.

the problem is the same as reported in bug#20835,
so the fix is backport of bug#20835 patch.


mysql-test/r/subselect.result:
  test result
mysql-test/t/subselect.test:
  test case

returns truncated results

Problem: performig conversion from {INT, DECIMAL, REAL} to CHAR
we incorrectly set its max length in some cases that may lead
to truncated results returned.

Fix: properly set CONVERT({INT, DECIMAL, REAL}, CHAR) result's
max length.


mysql-test/r/ctype_utf8.result:
  Fix for bug#36772: When using UTF8, CONVERT with GROUP BY
  returns truncated results
    - test result.
mysql-test/t/ctype_utf8.test:
  Fix for bug#36772: When using UTF8, CONVERT with GROUP BY
  returns truncated results
    - test case.
sql/item_timefunc.cc:
  Fix for bug#36772: When using UTF8, CONVERT with GROUP BY
  returns truncated results
    - calculating Item_char_typecast::max_length use initial
  argument's charset mbmaxlen instead of from_cs->mbmaxlen,
  as from_cs may differ in some case (see comment above).

Problem: memory leak occurs when we open a federated table
that has its share in the hash.

Fix: free not used memory.

Note: the fix should NOT be merged to 5.1 (the code changed).


sql/ha_federated.cc:
  Fix for bug#40875: Memory leak in FEDERATED handler
    - free memory (tmp_share.scheme) allocated in the parse_url()
  if it isn't used anymore.

The test itself is not faulty. The testcase timeout
problem happens if this IMHO mid size resource
(space in vardir, virtual memory, amount of disk I/O)
consuming test meets a weak (excessive disk I/O caused
by parallel applications or paging) testing box.

The modifications:
- Move the most time and disk I/O consuming subtest
  for Bug 1820 into its own script (multi_update2)
  This will reduce the likelihood that we exceed the
  testcase timeout.
- Replace error numbers with error names
- Minor improvements of the formatting

-