- Added suppressions for dlopen to make plugin test pass.
- Do not pass empty string to mysqld, since my_getopt is
  not capable to handle it.
- Re-enabled trailing UNINSTALL PLUGIN statement of plugin.test.

The memory leak described in the bug report happens in libdl, not
in mysqld. On some valgrind installations this error is suppressed
by default, no idea why it isn't suppressed on pb-valgrind.

<observation>
If library remains open after thread has finished, and is closed by
another thread, we get memory leak. But in case library is opened and
closed by the same thread no leak occurs.
</observation>


mysql-test/lib/mtr_io.pl:
  Do not pass empty string since my_getopt is not capable to handle it.
  This is required to make plugin.test work on platforms where
  ha_example is not compiled.
mysql-test/r/plugin.result:
  Updated test result.
mysql-test/t/plugin.test:
  Re-enabled UNINSTALL PLUGIN statement. It is a good idea to cleanup
  at the end of the test. Anyway bug22694 was fixed while this test
  was disabled.
mysql-test/valgrind.supp:
  Added suppressions for dlopen to make plugin test pass.

into  mysql.com:/home/svoj/devel/mysql/BUG28341/mysql-5.1-engines

Re-enabled plugin test to check if it still leaks memory.


mysql-test/t/disabled.def:
  Re-enabled plugin test.

BUG#28341 - Security issue still in library loading

Added required option files to rpl_udf test.


mysql-test/t/rpl_udf-master.opt:
  New BitKeeper file ``mysql-test/t/rpl_udf-master.opt''
mysql-test/t/rpl_udf-slave.opt:
  New BitKeeper file ``mysql-test/t/rpl_udf-slave.opt''

into  mysql.com:/home/svoj/devel/mysql/BUG28341/mysql-5.1-engines

UDF can be created from any library in any part of the server
LD_LIBRARY_PATH.

Allow to load udfs only from plugin_dir.
On windows, refuse to open udf in case it's path contains a slash.

No good test case for this bug because of imperfect error message
that includes error code and error string when it fails to dlopen a
library.


mysql-test/mysql-test-run.pl:
  Since plugins are allowed to be open only from plugin_dir:
  - there is no sence to update LD_LIBRARY_PATH
  - there is no sence to add plugin_dir arg by default
  - set UDF_EXAMPLE_LIB_OPT and EXAMPLE_PLUGIN_OPT to be used by
    udf and plugin tests accordingly.
mysql-test/r/plugin.result:
  Updated test result (we report addition warning).
sql/sql_udf.cc:
  Allow to load udfs only from plugin_dir.
  On windows, refuse to open udf in case it's path contains a slash.
mysql-test/t/plugin-master.opt:
  New BitKeeper file ``mysql-test/t/plugin-master.opt''
mysql-test/t/udf-master.opt:
  New BitKeeper file ``mysql-test/t/udf-master.opt''

into  mysql.com:/home/svoj/devel/mysql/BUG25712/mysql-5.1-engines


mysys/my_seek.c:
  Auto merged

into  mysql.com:/home/svoj/devel/mysql/BUG25712/mysql-5.0-engines


mysys/my_seek.c:
  Auto merged

BUG#25712 - insert delayed and check table run together report crashed
            tables
Fixed wrongly applied patch.

into  mysql.com:/home/svoj/devel/mysql/BUG25712/mysql-5.1-engines


include/my_sys.h:
  Auto merged

into  mysql.com:/home/svoj/devel/mysql/BUG25712/mysql-5.0-engines


include/my_sys.h:
  Manual merge.

BUG#25712 - insert delayed and check table run together report
            crashed tables

Let MY_THREADSAFE have distinct value. Some functions call my_seek
passing MyFlags argument directly to it. This may cause unnecessary
locks, which may finally lead to a dead-lock (specifically see my_lock).


include/my_sys.h:
  Addition to fix for
  BUG#25712 - insert delayed and check table run together report
              crashed tables
  
  Let MY_THREADSAFE have distinct value. Some functions call my_seek
  passing MyFlags argument directly to it. This may cause unnecessary
  locks, which may finally lead to a dead-lock (specifically see my_lock).
  
  Also it doesn't affect my_pread/my_pwrite in any way. So the comment was
  updated.

into  mysql.com:/home/svoj/devel/mysql/BUG25712/mysql-5.1-engines


mysys/my_seek.c:
  Auto merged
storage/myisam/mi_check.c:
  Auto merged

into  mysql.com:/home/svoj/devel/mysql/BUG25712/mysql-5.0-engines


myisam/mi_check.c:
  Auto merged
mysys/my_seek.c:
  Manual merge.

            tables

In case system doesn't have native pread/pwrite calls (e.g. Windows)
and there is CHECK TABLE runs concurrently with another statement that
reads from a table, the table may be reported as crashed.

This is fixed by locking file descriptor when my_seek is executed on
MyISAM index file and emulated pread/pwrite may be executed concurrently.

Affects MyISAM tables on platforms that do not have native
pread/pwrite calls (e.g. Windows).

No deterministic test case for this bug.


myisam/mi_check.c:
  Key file descriptor is shared among threads and mixed set of
  my_pread/my_pwrite and my_seek calls is possible. This is not
  a problem on systems that have native pread/pwrite calls.
  
  In case system doesn't have native pread/pwrite calls (e.g. Windows)
  we must ensure that my_pread/my_pwrite are not executed at the same
  time with my_seek. This is done by passing MY_THREADSAFE flag to
  my_seek.
mysys/my_seek.c:
  On platforms that do not have native pread/pwrite calls (e.g. Windows)
  these calls are emulated as follow: lock fd, lseek, read, unlock fd.
  
  In case file descriptor is shared among threads, where one thread
  executes my_pread and another thread executes my_seek, we may read
  from a wrong position. This may happen because my_seek doesn't lock
  fd and thus may be executed by another thread after emulated pread
  has done lseek and before it has done read.
  
  To fix problem mentioned above we introduce new flag MY_THREADSAFE to
  my_seek, which is meaningful only in case pread/pwrite calls are
  emulated. If this flag is set, lseek operation is performed as follow:
  lock fd, seek, unlock fd.

            can crash under load
Post-post-review fixes.
Fixed a typo == -> =
Optimized normal flush at end of statement (FLUSH_KEEP),
but let other flush types be stringent.
Added comments.
Fixed debugging.

into  chilla.local:/home/mydev/mysql-5.1-bug17332


mysys/mf_keycache.c:
  Auto merged
mysys/my_static.c:
  Auto merged
sql/handler.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
storage/myisam/ha_myisam.cc:
  Auto merged

into  mysql.com:/home/svoj/devel/mysql/BUG27998/mysql-5.1-engines


storage/blackhole/ha_blackhole.h:
  Use local.
mysql-test/extra/binlog_tests/blackhole.test:
  Manual merge.
mysql-test/r/binlog_stm_blackhole.result:
  Manual merge.

into  mysql.com:/home/svoj/devel/mysql/BUG27998/mysql-5.0-engines


sql/ha_blackhole.h:
  Auto merged
mysql-test/r/blackhole.result:
  Manual merge.
mysql-test/t/blackhole.test:
  Manual merge.

  "Blackhole tables don't honor table locks"
  Implement neccessary shared lock structure for table locks.
  Imported test case created by Giuseppe Maxia


storage/blackhole/ha_blackhole.cc:
  bug26241 - blackhole locks don't work
    Implement shared structure for table locks.
    Used row-lock code from archive.
storage/blackhole/ha_blackhole.h:
  bug26241 - blackhole locks don't work
    Declare shared structure for table locks.

into  xiphis.org:/home/antony/work2/mysql-5.1-merge


mysql-test/mysql-test-run.pl:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged

mysql-test/r/sp-vars.result:
  merging

into  mysql.com:/d2/hf/mrg/mysql-5.1-opt


sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/sp-vars.result:
  merging
mysql-test/r/type_datetime.result:
  SCCS merged
mysql-test/t/type_datetime.test:
  SCCS merged
sql/item_func.h:
  merging
sql/mysql_priv.h:
  merging

into  mysql.com:/d2/hf/mrg/mysql-5.0-opt

into  mysql.com:/d2/hf/mrg/mysql-5.0-opt


sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged

into  mysql.com:/d2/hf/mrg/mysql-4.1-opt

into  mysql.com:/d2/hf/mrg/mysql-5.1-opt


sql/ha_ndbcluster.cc:
  Auto merged
sql/item_func.cc:
  Auto merged

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.0-ndb

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-single-user

sql/field.cc:
  parameters fixed to not interfere with the Field_blob members
sql/field.h:
  BIGENDIAN machine will require 'table' member. so cannot be static

into  xiphis.org:/home/antony/work2/mysql-5.1-engines.merge


include/my_global.h:
  Auto merged
mysql-test/mysql-test-run.pl:
  Auto merged
scripts/mysql_install_db.sh:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_sum.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
sql/table.cc:
  Auto merged
sql/table.h:
  Auto merged
storage/innobase/handler/ha_innodb.cc:
  manual change to new api

  Move copying of global variables into thd.variables into plugin_thdvar_init().
  plugin_thdvar_init() may be called multiple times when THD::change_user() is called.
  This fixes a plugin ref-count leak when running the test mysql_client_test


sql/sql_class.cc:
  wl2936
    Initialize thd.variables to zero in constructor.
    Move copying of global variables into thd.variables into plugin_thdvar_init()
sql/sql_plugin.cc:
  wl2936
    Move copying of global variables into thd.variables into plugin_thdvar_init().
    plugin_thdvar_init() may be called multiple times when THD::change_user() is called.
    This fixes a plugin ref-count leak when running the test mysql_client_test

into  moonbone.local:/mnt/gentoo64/work/27759-bug-5.0-opt-mysql


sql/item_func.cc:
  Auto merged

 fixed coverage of out-of-mem errors

 - added join cache indication in EXPLAIN (Extra column).
 - prefer filesort over full scan over 
   index for ORDER BY (because it's faster).
 - when switching from REF to RANGE because
   RANGE uses longer key turn off sort on
   the head table only as the resulting 
   RANGE access is a candidate for join cache
   and we don't want to disable it by sorting
   on the first table only. 


mysql-test/r/archive_gis.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/compress.result:
  bug #27531:
   - join cache in EXPLAIN. 
   - prefer filesort over full scan over index for ORDER BY.
mysql-test/r/ctype_utf8.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/derived.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/distinct.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/func_group.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/func_group_innodb.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/gis.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/greedy_optimizer.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/group_by.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/group_min_max.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/index_merge_myisam.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/information_schema.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/innodb_gis.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/innodb_mysql.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/join.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/join_nested.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/key_diff.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/myisam.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/ndb_condition_pushdown.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/ndb_gis.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/range.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/row.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/select.result:
  bug #27531:
   - join cache in EXPLAIN.
   - prefer filesort over full scan over index for ORDER BY.
mysql-test/r/ssl.result:
  bug #27531:
   - join cache in EXPLAIN.
   - prefer filesort over full scan over index for ORDER BY.
mysql-test/r/ssl_compress.result:
  bug #27531:
   - join cache in EXPLAIN.
   - prefer filesort over full scan over index for ORDER BY.
mysql-test/r/subselect.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/subselect3.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/union.result:
  bug #27531: join cache in EXPLAIN
mysql-test/r/view.result:
  bug #27531: join cache in EXPLAIN
sql/sql_select.cc:
  bug #27531:
   - join cache in EXPLAIN.
   - prefer filesort over full scan over
     index for ORDER BY.
   - disable sorting on the first table only
     when switching from REF to RANGE.

The LEAST/GREATEST functions compared DATE/DATETIME values as
strings which in some cases could lead to a wrong result.

A new member function called cmp_datetimes() is added to the
Item_func_min_max class. It compares arguments in DATETIME context
and returns index of the least/greatest argument.
The Item_func_min_max::fix_length_and_dec() function now detects when
arguments should be compared in DATETIME context and sets the newly
added flag compare_as_dates. It indicates that the cmp_datetimes() function
should be called to get a correct result.
Item_func_min_max::val_xxx() methods are corrected to call the
cmp_datetimes() function when needed.
Objects of the Item_splocal class now stores and reports correct original
field type.


mysql-test/t/type_datetime.test:
  Added a test case for the bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
mysql-test/r/type_datetime.result:
  Added a test case for the bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
mysql-test/r/sp-vars.result:
  A test case result corrected after the fix for the bug#27759.
sql/mysql_priv.h:
  Bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
  Added the prototype of the get_datetime_value() function.
sql/item_func.h:
  Bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
  A new member function called cmp_datetimes() is added to the
  Item_func_min_max class.
sql/item_func.cc:
  Bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
  A new member function called cmp_datetimes() is added to the
  Item_func_min_max class. It compares arguments in DATETIME context
  and returns index of the least/greatest argument.
  The Item_func_min_max::fix_length_and_dec() function now detects when
  arguments should be compared in DATETIME context and sets the newly
  added flag compare_as_dates. It indicates that the cmp_datetimes() function
  should be called to get a correct result.
  Item_func_min_max::val_xxx() methods are corrected to call the
  cmp_datetimes() function when needed.
sql/item_cmpfunc.cc:
  Bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
  The get_datetime_value() function is no longer static.
sql/item.h:
  Bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
  Objects of the Item_splocal class now stores and reports correct original
  field type.
sql/item.cc:
  Bug#27759: Wrong DATE/DATETIME comparison in LEAST()/GREATEST() functions.
  Objects of the Item_splocal class now stores and reports correct original
  field type.

into  magare.gmz:/home/kgeorge/mysql/work/B27531-5.1-opt-after-merge


mysql-test/r/join.result:
  Auto merged
mysql-test/t/join.test:
  Auto merged
sql/sql_select.cc:
  Auto merged